Long Block Value?

[WidowMakerTRX]

So I am installing the Redeye/Demon Long Block and swapping over parts from the Hellcat (FRP Cam, ATI Dampner, Supercharger, Accessories, etc.)

This will leave me with the following:

Stock Hellcat Short Block w/ pistons kissed by valves
Stock Hellcat Heads with bent intake valves
New Redeye Camshaft (from New block)
New Redeye Springs (from New heads)
New Phaser (from New block)
New Stock Lower Pulley (from New block)
Used Valve Covers
Used Water Pump

My question is...if I wanted to try and trade my old, damaged Long Block to the shop in exchange for labor....what price would be reasonable to ask for? I only ask so I dont screw myself but Im not trying to screw hmthe shop either...just not sure what would be a good ask for a damaged long block thst can be rebuilt with new pistons and valves and be a good long block.

 

[WidowMakerTRX]

I know its not going to be some crazy high number....just curious since it could be rebuilt by them and sold