See the ebay listings for lezanderson77 who is selling kits of chips going for £10-£20, to build 6502, 68000, Z80 single board computer.



See also this site where there's a pointer to a document


(I've no association with this effort, and no idea if the designs are sound, but it all looks genuine)
Cheers
Ed

I think the parts are worth the price alone. I bid and hope you help me with it.

Which kit did you choose? If it's 6502, it might be good to continue over on 6502.org - I haven't mentioned these kits over there.

I chose the 6502 parts and I won. I think the price was reasonable.
I'll look for datasheets but I will probably put them away unless I decide to start with an Apatco computer.