Seasider

He has over 200 of them at the moment 2023 Achilles Legendary Warriors 1oz Silver Bullion Round (silvertrader.uk)

Silvertrader is showing this as due in 2-3 days. Silver Bullion Coins & Bars - Silver Trader UK

You might want to look on here for German dealers with Elephants in stock Somalia Elefant Silber | Preise vergleichen auf GOLD.DE Of course there is the dreaded Customs palaver if you import from Germany these days. There was also a 15 year commemorative in 2018 with a mix of the 2004 version and the 2018 version. It always looked to me as if the 2004 elephant was levitating so I wasn't keen on it - perhaps that is why I remember it.

When you say slabbed I assume you mean the coins were graded by NGC PCGS or the like. There is a whole section on here dedicated to selling such coins United Kingdom (Graded only) - The Silver Forum There are also auction houses which specialise in that sort of thing such as The Coin Cabinet, Coins of the Realm and the Coinery. So they should not be that difficult to sell.

If you look at the proofs there is a date on both sides of the coin.

There is an auction house in Kent which may help with this and with the stamps only covers. It is called Martello Philatelic Auctions Home | martelloauctions.com Obviously if you sell through them there will be commission to pay (which there isn't on here) but they do coins as well as stamps so could be a one stop shop. I have no connection with them!

I'd guess at Birmingham 18ct 1963-4. The date letter for 1963-4 is an italic O looks a bit like a rugby ball.

Nice NGC label

Could be worse An H.G Wells first release PF70 Ultra cameo 2021 Gold £2 coin in an NGC plastic sleeve together w (the-saleroom.com) I am told this is not NGC's fault. Someone took the coin out and put it back the wrong way round!

It was @LawrenceChard

Try @morezone

I was talking more about eye appeal. It can depend on the coin but the prime example for me is the 2012 sovereign. Bullion and proof are the same design but they are worlds apart when it comes to eye appeal. The design just blends into the background on the bullion while it really pops on the proof. Libertads are a bit like that. Proofs tend to cost a lot more than bullion and you are probably right to steer clear of them. There is a thread on here somewhere of someone who collected proof sovereigns and then could not sell them for much more than bullion prices. And before anyone says anything I think he did try selling on here. Personally I think grading is more for collectors than stackers so I wouldn't worry about it if I were you. Grading costs a fair bit so economically it makes more sense to grade a proof sovereign than say a silver sixpence. But you can grade almost anything for any reason. Adding value is not the only reason - you may just want to know it is genuine if it is something that gets faked a lot (eg Indian Head $5 or old Chinese silver "dollars"). If you get a 70 grade for a modern proof that should add value. If you get 69 that is probably a wash and if you get below 69 then you have wasted your money. Of course if you have a 1937 sovereign in 62 63 or 64 you have a very valuable coin indeed especially if it gets an Ultra Cameo or Deep Cameo designation.

I have never bought direct from the Perth Mint so I do not know but there are plenty of horror stories on here of being charged VAT on imported gold coins and having to claim it back (and getting an admin charge from the courier company). It is quite easy to pick up Aussie coins from UK dealers. New ones from Chards or Atkinsons (they are in Birmingham so could be convenient for you). Old ones you could look at HGM as you never know what will walk through their door. One other foreign coin to look out for are the Mexican Libertads (although they look a lot better in proof than in bullion).

That could get expensive depending on the dates you have in mind. Try not to go back before 1837.

VAT is (to date) only an issue for silver and platinum not gold.