Aren't A-Body 8 3/4" axles supposed to be in demand?

I looked in the classifieds here and see three for sale with Sure Grip chunks in them (Mine included in that three) and they don't seem to be getting much attention.
I know they are not cheap but I thought that Summer would be a great time to sell stuff since almost all the shows and swaps are in the Spring, Summer and early Fall.
What the heck ??