Hi, Just looking at the price range for these(without capsules) that others may have a better idea of. I got offered some 1/20oz gold without capsules at $125-$135 and 1/10oz gold without capsules at $220(two are proof coins). They are rabbits, horses, snakes, rooster and dragons. Ebay prices didn't seem realistic as they have been listed for awhile without any buyers.
To me a Proof without capsule/cert = no numi value, a bullion coin without capsule = spot. I would only pay somewhere between spot and the current goats retail ($100 and $177 at goldstackers).
5 to 10 per cent over spot would be the maximum without capsules. Otherwise you will not get the premium back when you want to sell.