Value of 273 steel crank?

I've got two 273 steel cranks, one is 10/10 and balanced to 340 rods & cast 8.5 pistons. The other I'm not sure of the undersize. I just retrieved it from my parent's garage and haven't measured it yet.

Anyway, what's the value of these? I don't know that I want to keep them around as I have no plans to build any motors in the near future. Plus, we might be moving and these would be a pain to move.

I'd like to see them get used in somebody's project. Craig's List hasn't worked for the one that is balanced.

Thoughts?