... watermarking it does not help.
That was not my point.... That is why sellers plaster their logos/usernames ontop of the items in their pics.
To make them harder for others to reuse as eBay will not do anything about others copying the listing.
The REAL transgression here is that the "other seller" is stealing (ie, "theft by deception") the reputation, and good will, of the "real tugm4470"--which was duly earned. eBay would be understandably upset, and would send an eloquence of lawyers ( ) after my ass, if I had an online auction site named "Ebay" (vs eBay), and using ebay.org (note that the "other seller" has a very similar product mix to the "real tugm4470").
I hope that's clear ... or at least less unclear ...