i have a modded/restored 302 cleveland V8 & i got some intrest from someone to buy it, but im just not sure how much the engine is worth anymore?

what i have done to the engine is;

new pistons & rings
new bearings
cylinder re-sleeving
cylinder deck shaved 5 thou
crank re-grind + Balance
Stg 2 heatseeker cam
stg 2 unleaded heads
500 holley carb
Engine NOT run in (driven about 15 kilometers total)

the car its sitting in i have unfortunatly let get out of hand and is pretty useless (XE S Pac)

how much could i get for this Engine, i really don't want to sell it but life becomes expensive sometimes.

to be quite honest cleveland 302's are pretty common and therefore relatively cheap (maybe jump on Gumtree to get an idea of price range ) - you see them from a couple hundred up to maybe a grand for a good one....