Cooper S Parts for sale price query

I have some Mk2 S Parts which I would like to sell but don't know how much to ask for them. Could someone please advise on what they are worth.

I have a set of 1275 S discs/shafts assy (good condition) Some hydro units (various conditions)

1275 S Block/head/rods/en40 crank all good. I think the block is +020 and 4 synchro box - good

Dismantled my S sometime ago and never put it back together :(

Thanks for any help

Pete