anybody know anything about topps porcelian cards-i raninto quite a few-from a big collection

anybody know anything about these things, i got mantles/ryan rookie ones,all kinds of of from a big collection i bought from about 100 miles up the river,ive heard about em,just never payed any attention as i ve never had any beofre, have 5 or 6 diff mantles/ryans/ cal ripkins/not sure who else,think i saw sosa i dont know what all in em yet, 500,000 cards ya just have to take your time, i found emmits matt!!!!!!!!need any????



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Because I have some is the biggest reason as to why they most likely aren't worth anything.
J/K, perhaps, but while I liked these, I never took them seriously as collectibles.
I see them sell on eBay quite often, but typically for no more than $10. I'm sure certain versions can have a slight premium though. Topps also made matching porcelain plates and coffee mugs.