1. last time i was fooled by the crooked Bottecchia frame—what ebay did for me was pretty clear and simple.
they didn't go by interpreting descriptions e.g) what's good or very good, but by whether there was a discrepancy between the description and the actual item.
as long as you can clearly state what's not in the description—PICS being a part of description, btw—or what differs from the description, they will be on your side.
for instance, IMO, if 'oxidation' part was not clearly in the description, ebay will see it as the seller was 'hiding' the fact.
when resolved, they also sent me pre-paid lable giving me no worry of paying the return s/h.

2. not entirely related but reference-able
i bid on a replica soccer uniform. when arrived i found it was a knockoff. not terribly manufactured but obviously not authentic. looked at the auction page and realized there was no single word of 'authentic' anywhere. photos were nicely enough to make me think it was an authentic Puma shirt. hard to claim the return at the moment. the i found one photo depicting the authenticity label on the shirt. of course it was fake label on a counterfeit shirt, but 'authentic Puma blah blah' on the label was totally legible in the photo. i attached it to my claim to ebay, stating that was the photo in which i believed it was an authentic, although there was no single word 'authentic' in the entire auction page. ebay raised my hand issuing me a refund. however, i needed to pay return as it was from Germany. ebay didn't want to pay for an int'l s/h, i guess. (funny thing, the return address was in Thailand while the seller was marked as living in Germany and the item was supposed to be from Germany)

these are my recent 2 stories around ebay claim through 'Buyer Protection' thingie for your reference.
i am most confident at that you can return them for full return with even the cost fully supported by ebay in this case.

and as you've mentioned earlier, if you'd like to collect various opinions on it, here is mine:
most o' the parts look POS, i'd definitely claim a complaint and try to return them for full refund.
no way using such things on "my" bike unless i rooted for a whatever at cheapo price scoping some elbow grease.
we are talking about a few hundred bucks "VGC" Campies here, right?

good luck.