I would try and contact ebay, I know they are bad about suspending accounts without asking questions first. But I would contact them and offer proof that the items were authentic. Sometimes it takes a bunch of emails, but it's worth the trouble if you can get back on..
Most of the time it always another seller who hits the 'report button' located at the bottom of every listing. I talked with an ebay rep about this same problem 2 years ago. They said that they 'depend heavily on other ebay members to police the site, by reporting fraudulent sellers'. In addition they stated that if a Verifyed Rights Owner (vero) reports a listing, ebay shuts it down, no questions asked. If a ebay member reports it, then a member of the ebay team is suppose to go and take a look at the listing and then based on what they see, make a decision as to wether to let the listing run or to shut it down..However most of the time they have so many listings to look at that the just automatically shut it down..
There are a lot of powersellers on ebay who use this tactic to get their competition shut down. They normally target new and inexperienced sellers. Most of them don't know what to do about it and just give up.
When I sold designer goods I always put a copy (photo)of the receipt from where I purchased the item and also added a disclaimer at the bottom of the page: 'I am not affiliated in any way with ^%$#&& industries. All items are gauranteed authentic and proof of authenticity can and will be provided upon request.'
Meanwhile you might want to try out other sites such as ubid and several of those. Do a google search and look for 'top 10 auction sites' or something like that and try using a few of the top sites. Craig's list is suppose to be good also..In addition you might want to get in touch with grahamg, he's a master member on here and has a ebook out that explains all about marketing on craigs list. I think it has something in it about showing how to list in multiple cities also..Anyway I've heard pretty good things about the book and from his posting on the forum he stays on top of the market pretty well. Check any of his postings and he has a link to the ebook in his signature on any of his postings..