The listing in the wrong category thing is a joke. I was looking at Ammonite fossils yesterday on eBay and one seller in particular, when I searched their listings just for that name, I got some ridiculous amount of results. I'd say only 20% of the search results saw the actual Ammonites, the rest were things like quartz, labradorite, jewellery, clothing etc. When I clicked on one those items to see what was going on, they were all listed under the Ammonite category. Funny how their listings don't get canned and a stern warning from eBay about listing in the wrong category. Ammonites are listed under fossils and none of the other ones even remotely resembled a fossil!

In regards to the Playboy mags, there are listings on eBay Australia for them as I just did a search to check. Maybe they do allow them? Then again, maybe the sellers just haven't been caught yet!