Tube dealers on E-Bay

We all realize it"s a gamble buying NOS tubes on E-Bay. I had a momentary lapse of sanity, got greedy, & got burned from a U.K. dealer. I just want to remind everyone to go ahead & pay a little more,& stick with your "go to" trusted tube dealer.  Also, don't go totally on feedback profile because apparently a dealer can manipulate E-Bay into retracting sub-positive feedback "under the table"..