Yes ebay sounds like the go if you can only get spot price. Here in australia we have a few companies that travel around and they don't care if it's a rare coin or not and will only give spot as they say they're only going to melt it down and if that's true it's a real shame as some coins are part of our history and once they're gone you can never get them back 
Since they have to pay 5% fee on small melter lots they try to sell the coins for a few months and longer in a bullmarket
So this means that real melters they will offer only 95% of spot . They were very sensitive to polished jewelry coins
offering only 95% of spot
The coins have copper they will reoxidize over 10 years so the jewelry coins I have are back to normal
I now for a fact that at least one big UK ebay vendor used to go to Brussels to pick up Double Eagles all bought far below their real grade . Double Eagels however now have been nearly completely purged from non collector hands