ChrisSilver

SD usually refers to 'Special Delivery' as in Royal Mail Special Delivery, a serviced from the Post Office used within the UK to send parcels. https://www.royalmail.com/sending/uk/special-delivery-guaranteed-1pm

By default Special Delivery it insured up to £500 (and the only service that can be used from Royal Mail that is insured by them for precious metals) additional coverage can be purchased up to £2500. Delivery is guaranteed next day by 1pm from dispatch. 

Be careful ⚠️

SD is just abbreviated letters and could stand for anything, including 'Standard Delivery' it is advisable to check with the seller first to make sure it is Special Delivery, as standard Royal Mail will not be insured. 

SD usually refers to 'Special Delivery' as in Royal Mail Special Delivery, a serviced from the Post Office used within the UK to send parcels. https://www.royalmail.com/sending/uk/special-delivery-guaranteed-1pm

By default Special Delivery it insured up to £500 (and the only service that can be used from Royal Mail that is insured by them for precious metals) additional coverage can be purchased up to £2500. Delivery is guaranteed next day by 1pm from dispatch. 

Be careful ⚠️

SD is just abbreviated letters and could stand for anything, including 'Standard Delivery' it is advisable to check with the seller first to make sure it is Special Delivery, as standard Royal Mail will not be insured. 

SD usually refers to 'Special Delivery' as in Royal Mail Special Delivery, a serviced from the Post Office used within the UK to send parcels. https://www.royalmail.com/sending/uk/special-delivery-guaranteed-1pm

By default Special Delivery it insured up to £500 (and the only service that can be used from Royal Mail that is insured by them for precious metals) additional coverage can be purchased up to £2500. Delivery is guaranteed next day by 1pm from dispatch. 

Be careful ⚠️

SD is just abbreviated letters and could stand for anything, including 'Standard Delivery' it is advisable to check with the seller first to make sure it is Special Delivery, as standard Royal Mail will not be insured. 

What does bump mean when you see it in a listing?
The default sort method of topics on the forum is by recent activity.
Sellers “bump” their listing to the top by posting the word “bump” in their listing. This is done if the topic hasn’t had any recent posts in (as recent posts would themselves “bump” the topic)
Members may use one “bump” per day in their listing. More than this would count as excessive use and abuse of the system.

The forum's Terms and Conditions as of October 2020, in regards to bump reads:
 

Fiat currency is legal tender whose value is backed by the government that issued it. The U.S. dollar is fiat money, as are the euro and many other major world currencies. This approach differs from money whose value is underpinned by some physical good such as gold or silver, called commodity money...which we would just term here as PM or Precious Metal.

Definition by @CadmiumGreen

Bullion refers to precious metals in bulk form which are regularly traded on commodity markets. The value of bullion is typically determined by the value of its precious metals content, which is defined by its purity and mass.
The specifications of bullion are often regulated by market bodies or legislation. In the European Union, the minimum purity for gold bullion, which is treated as investment gold with regards to taxation, is 99.5% for gold bullion bars and 90% for bullion coins.[1]
To confirm the purity of the gold, a modern laboratory uses modern XRF technology to accurately assess its quality in order to ensure the owner receives fair market value for it. It is also weighed extremely accurately.
There may be several reasons that investors choose to purchase physical gold bullion; to attempt to hedge against currency risk, to attempt to hedge against inflation risks, to attempt to hedge geopolitical risks, or to add diversification to an investment portfolio.

What does bump mean when you see it in a listing?
The default sort method of topics on the forum is by recent activity.
Sellers “bump” their listing to the top by posting the word “bump” in their listing. This is done if the topic hasn’t had any recent posts in (as recent posts would themselves “bump” the topic)
Members may use one “bump” per day in their listing. More than this would count as excessive use and abuse of the system.

The forum's Terms and Conditions as of October 2020, in regards to bump reads:
 

What does bump mean when you see it in a listing?
The default sort method of topics on the forum is by recent activity.
Sellers “bump” their listing to the top by posting the word “bump” in their listing. This is done if the topic hasn’t had any recent posts in (as recent posts would themselves “bump” the topic)
Members may use one “bump” per day in their listing. More than this would count as excessive use and abuse of the system.

The forum's Terms and Conditions as of October 2020, in regards to bump reads:
 

What does bump mean when you see it in a listing?
The default sort method of topics on the forum is by recent activity.
Sellers “bump” their listing to the top by posting the word “bump” in their listing. This is done if the topic hasn’t had any recent posts in (as recent posts would themselves “bump” the topic)
Members may use one “bump” per day in their listing. More than this would count as excessive use and abuse of the system.

The forum's Terms and Conditions as of October 2020, in regards to bump reads:
 

This terminology is used to reference the face of a coin and is often confusing so here is a simple description.
The obverse is the "head" so for a UK coin it would show a portrait of the Queen.
for non portrait coins it's the official side and usually non varying within a set. eg coat of arms side.
The "reverse" is the backside or tail of the coin.
 

Not to be confused with an ounce, a Troy ounce is used to measure the weight of PMs and is exactly 31.1034768 grams so approximately 10% heavier than a normal ounce.

Bullion refers to precious metals in bulk form which are regularly traded on commodity markets. The value of bullion is typically determined by the value of its precious metals content, which is defined by its purity and mass.
The specifications of bullion are often regulated by market bodies or legislation. In the European Union, the minimum purity for gold bullion, which is treated as investment gold with regards to taxation, is 99.5% for gold bullion bars and 90% for bullion coins.[1]
To confirm the purity of the gold, a modern laboratory uses modern XRF technology to accurately assess its quality in order to ensure the owner receives fair market value for it. It is also weighed extremely accurately.
There may be several reasons that investors choose to purchase physical gold bullion; to attempt to hedge against currency risk, to attempt to hedge against inflation risks, to attempt to hedge geopolitical risks, or to add diversification to an investment portfolio.