So I was going thru my TRK Rounders lamenting why I can' build a small tourney set when I find these 3x $25 chips with .25 inlays on the other side. I am not a singles collector so I have some questions. Are these common mistakes in the TRK Rounders line? And how much are these error chips worth to collectors? Is there collectors that specialize in error chips? Thanks for any help.