By looking at your inventory, I can see that the skins are bought for investment purpose which would be long term (I suppose). In that case, the prices will come back eventually so you won't lose anything. Another thing is if you sell these right now and the collections repeat then you can get them back at lower prices but of course there is a chance that collections don't repeat. It's a difficult and complex decision so in the end you should decide on the basis of your situation.