There are at least 2 types -- one with a thin $1 and one with a fat $1 -- and the asymmetric inserts bring insert variations into play. Both are SCV mold types. If there is the possibility of the LCV types, then 12 different chip variations are possible. But I agree with Reggie - none are rare enough to demand a $20+ price tag. Also, most of the chips are in mint condition too.