You can report people who spam newsgroups with their Ebay auctions, which is a clear violation of Ebay's TOS, at
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- Click on "Contact eBay Customer Support Now!
- Click on a. Report Problems with other Ebay Members b. Spam, fake emails, and other email-related problems c. Either "User sent you unwanted, commercial email (spam) or "The problem you're having with email isn't listed"
- Fill in blanks on form and attach a full cut-and-pasted copy including full headers, then submit.