The Buyer Beware adage "If it sounds to good to be true... It probably is" comes to mind.
There may have been more problems with that engine than just missing cams.
There will always be another engine.
going off personal experience of a week ago here, ive been looking around for a new motor for my 88 RX7 GXL since its cheaper usually to buy a newer used motor than it is to rebuild the one i have already, so im looking on craigslist when i see one come up for $200 and only about 60 miles away from me, so i exchange a few emails with the guy and we agreed on a time to meet at his house.
well, first sign of misconception here was that the motor was sitting sideways on the floor and in the picture he had on craigs list he had it upright, braced and strapped to a wooden pallet.
second sign, everything thing the guy told me he had with the motor wasnt there,, no exhaust manifold, no throttle body, no accessory brackets, nothing..
third sign, he told me that the reason he'd taken it out of the car in the first place was to replace the rear coolant seal, which is the same reason i need to rebuild (or re-seal if you like) the motor i already have.. so i told the guy to **** off and drove home angered that id wasted a tank of gas to go and see such bull****.
im agreeing with trunk on this one, "if it sounds too good to be true.. it more than likely, is.."
just keep that in mind and get a real good look at whatever you buy like that especially for that seemingly good of a price..
just my $.02