I'm afraid that this coin is basically just scrap - 1723 SSC is a very common piece (unless it is one of the rare varieties like French arms at date or C over SS in the third quarter, which this isn't) and pieces in much better condition don't cost the Earth. With the recent rise in scrap price, yours would be worth way more as a lump of silver than its recent "collector" or "book" value for a coin so poor (and I doubt anybody would want to buy it as a coin to collect), so, sadly, scrap it and put the money towards buying a better piece, be it a nicer one of these, or anything else that takes your fancy.