how much is a volkswagen beetle ,1971 worth? this not a super beetle

We have rebuilt this bug,sandblasted it,put new panels on it,(floor pans, side pans,)
Where ever there was rust.
New shocks,brakes lines and have bled them:clutch cable, and a new electrical system in it
as well.
Painted it and sealed the body for weathering (underneath the car)
  Now the engine  is rebuilt and broke on us..... so was wondering how much we could sell it
for as is?   If that does not work out , could put a type one engine in it for 200.00  which it will
run at this point. transmission is good!     how much would it be worth them?
this not a super beetle