well, you are the coin guy!
Mr Smith: I've met you at least twice in person. This item has a very static value unless it was one of the very first K-rands from the early 70's, I'm quite sure it is just a generic year coin.
I've told you what you should get for it reasonably at current prices, About $1675. Maybe you could make a deal with a local TV station and wear a mike and play the big dummy and see what you get offered at various places ( there must be hundreds of sleazy buyers in LV) including G&S pawnshop.
I'd consider approaching the media on this ( undercover), for compensation to see what you get offered....
My grandfather left me this.... What's it worth , type of deal ?
I know you're like 6' 5" ( minimum), punch out the guy that says $700 for me !