Said auction site wrote back last night, telling me that despite me shipping perhaps 20 letters of problem ID to them, they couldn't find the problem or respond to me but had to respond to the original user.
Fat lot of good helping someone does, then. They also recommended that I/we visit a community help site (how private and unique that would be!) for answers instead.
Finally, in line with the mention above, they completely failed to respond to my questions. Not a word.
This is community support like a Halo vest would be.