W5 Heads for sale.. how much are they worth?

I have a set of the later 1996 castings/blue capped for whats its worth with maybe 100 miles on them to and from the track before going to a big block. I also have the M1 intake and offset rockers to go with them. I was wondering how much this set up is worth as its time to start cleaning out the old Mopar garage. I know X J w2 and or edelbrock heads do not flow as much as these but I only have a 340 engine and one needs a stroker? to really make these come alive? Any thoughts on what they go market for now days. .