You should see close to 800-1000 for the t4

Head depends upon condition - but if all new and complete prob 800-1000 again

Then you have the rest of the engine to sell

Green injectors - 100 quid
Swedish inlet - 2-300 quid
block - condition dependant 700 for a bare block
pistons and rods - 150
crank - 250
verniers - 100

thats roughly 3.5k and prob loads more ive missed