[Amps] Any experiences with "powergridtube"? (YC156 hunt)

[Jim Barber]

  I'm looking to buy a couple of YC156's for a project, either rebuilt 
or full-output pulls.

There's a current eBay auction by "powergridtube" that lists 5 tubes 
"cleaned and laboratory tested to full output", although no specific 
guarantee is given. Any experiences with this guy? (replies off-list ok 
to save feelings and avoid flame wars)

http://cgi.ebay.com/Tested-Eimac-YC156A-MRI-RF-Tube-/290481794913?pt=LH_DefaultDomain_0&hash=item43a2106f61

Thanks,
Jim, N7CXI