Thoughts On Pre-Civil War Southern Gold D And C Mints (Especially Half Eagles)

For many years I've been watching these coins that only recently have had pricing come down to earth ($5 XF to AU in particular). To my observation, a lot of collections have come to market in the last couple of years bringing supply up. Personally, I've been taking advantage of this new supply which has yielded lower prices but with prices firming lately. Demand seems to be reacting to the supply. But will the supply soon end, I am not an insider and don't know where these are coming from and how long they will "flood" the market.

What do others think of the supply of these coins?