selling my spare YB motor as I'm trying to buy a house

Spec is

Small core RS 500 block
Long studded
Dry sumped twin scavenge set up
Neil roper ported and polished head
Big inlet cam
New crank Pistons with cut outs
Hart Inlet manifold
This is a fresh build built by joe Stevens
Would do 600hp with the right turbo etc etc
Looking for £6000