I only have 3 that I would keep. NOE 311-165 RD the old style small meplat, My first mold ever Mihec 503 copy Cramer HP, Mihec 432423 solid.
The oddest casting mold is one I just got from Ben. Its a 311467. 1 cavity will drop its bullet any time I open the mold. The second cavity the only way it easily gives up its bullet is if I open the mold IMEDIATELY after I cut the sprue. If I delay even 1 second I have to repetedly tap the mold
I've given 2 away to brand new, wannabe casters and hope it wet their appetites.