adamj

Hello Adam, welcome to The Silver Forum!
In general, and assuming specimens of a particular coin in good condition are available at the market, a subpar condition of a coin matters a lot. While I know only little about this particular coin type, based on my quick research it seems it is on the market in nice conditions quite a lot, so in my opinion, a collector's motivation to buy your coin for a premium price won't be too high, unfortunately.
As an example, recent auction result for this year (for a coin not in the best condition, either) was $576 incl. fees, i.e. ca. £455: Goldberg Auction Lot 1009. And that was a PCGS graded coin.
Please treat this only as one piece of information, just to give you an idea how a comparable coin fared on the open market. Next time you offer yours, you may fetch much higher interest in it, who knows. It also depends on how long you are willing to wait for the right buyer.

In this condition, unfortunately, it is worth its gold value.
1859 (not 1969..) Sidney mint sovereign is indeed a very sought after year, but for coins at least in XF conditions. Your is (especially the obverse) in very fine or even worse condition ((