"For Sale" "Contents" failing.

I have a number of vendors that I created by setting a prim to "For Sale" and selecting "Contents". The vendors at my shop in Caledon Eyre have been failing to deliver the contents. Testing again this morning, they took my money, but again failed to deliver the contents.

My vendors at other shops in other sims have worked, so I asked the sim owner restarted the sim, but the problem has persisted. I rezzed a new vendor from inventory, and again, no luck.

Scripted vendors have been working at that location (for obvious reasons, I'm switching to the HippoVend system), but I still have several single prim vendors in place, and I would really like to have them work

Any ideas about what I can do?