Hi, this question comes up frequently on the forum. "Why was my item taken down, and not theirs?"
The answer is "It depends." Sometimes the item is allowed for certain pre-screened sellers to market. Other times it is because information that is supposed to be in the listing is missing, according to policy. Sometimes it is because eBay failed to catch theirs and caught yours instead. Or your listing was reported and theirs wasn't. Ebay relies on the community to report policy violations. While the eBay powers-that-be are not transparent in how they police the site, it is generally accepted that a single disgruntled competitor would not be behind a takedown. It is said that multiple reports from different sources are given more weight, in particular a defrauded buyer's report counts more than say, a random member. Ebay will also remove stale listings, a newer policy change. If an item has sat without sales for months on end, eBay reserves the right to remove it. Below is a link to the eBay help pages covering removed listings and the possible reasons why.
https://www.ebay.com/help/selling/listings/creating-managing-listings/removed-listings?id=4656
