so i have alot of boards from the early 90's and some that are even older.

i have removed alot of cpu's from the boards
the ones i got include 286/386/486 and newer

what i would like to know is if there is value in the older chips and what there prices are per lb.

some of the cpu's i am trying to put a value to are ones like these

intel 8088
intel 8086
intel 8008
intel math co-processor

what other cpu's and valuable chips should i be looking for in the very old boards

thank you everyone in advance