So I've been buying modern gold bullion coins for a while now and have been paying a couple % points above spot. When I go to sell sometime in the future, should I be looking to get spot, or will the bid always be a couple % points below? Is 6-8% the typical bid/ask spread (i.e. 3-4% on either side of spot)? Does it work the same way for pre-1933 common date "numismatic" gold? Thanks in advance for the education.