hlfinn, my heart goes out to you, this must be very difficult and upsetting. But now, I'm going to tell you what I would tell my daughter if she came to me with this situation. I bought my first Hermes scarf in about 1973 - known the brand for a while! Also, I spent my childhood going to auctions of all kinds with my parents. It's a whole different world, that. Auctions are caveat emptor - let the buyer beware - all the way. So fix yourself a nice cup of tea....
First, I do believe that the auction you bid on was a bit misleading - but just a "bit." It did say "carre" in the title. However, it ALSO listed the size in the auction itself. So you really have only half a case for misrepresentation. And expecting eBay or Paypal (or some third party trying to determine "fault" here) to understand the finer distinctions in Hermes terminology might be a bit unrealistic. In fact, if I didn't know anything about Hermes and were trying to figure this out, I would think, well, the size IS on there...so you may have less than half a case. If you didn't wonder about the size, maybe you should have. Also, you could have asked the seller about it before bidding. You will find many items on eBay from perfectly honest sellers who are just out there selling "stuff" that have descriptions that use the wrong words - it's up to you to figure out what the item actually is. It doesn't mean they are trying to be misleading, it just means they are not as educated about that particular item. If you sell lots of items, well, you can't be an expert on everything, nor can we as buyers in this marketplace expect it. You also cannot expect buying on eBay - even from approved sellers - to be the same as buying from a store. You cannot buy anything on eBay expecting that returns will be easy or even possible.
Second, this seller is not on the tpf approved sellers list, which I hope you looked at before bidding. This does not mean you cannot get authentic Hermes items from unknown sellers, what it DOES mean is that if the seller is unknown, YOU need to have a whole lot of knowledge. Bargain hunting of high-end luxury items is for experts with nerves of steel. (The good news - keep reading here, and you soon will be an expert! AND have a whole forum of experts to help you!) So if a seller is not on the list, you could have - before purchasing - posted the item to "Authenticate this Hermes" thread (which you may have done?) and also carefully read every item in the seller's feedback. Now, I have not clicked through to all her completed auctions (VERY informative thing to do, if the auction #s have an active links, which recent ones usually do), but she seems to have sold mostly postcards and wedding gowns. This tells me not to expect a high level of Hermes knowledge from her. Caveat emptor again.
Third, is she a nice person? Well, maybe and maybe not. I do know that I work with a lot of younger people who complain about their landlords, sometimes rightly. Sometimes I do have to speak up though - because I own rental property and let me assure you that for every story a tenant can tell on landlords, a landlord has at least one, and probably two, for tenants! Every person who sells on eBay - and for the record, I do, although only my own things, not professionally - runs up against some of the rudest, nastiest, most unprofessional and sometimes stupid people on the planet. You have to develop a thick skin, set your rules, and although I try to be courteous to everyone (I have gotten nasty e-mails from people I refused to end an auction early for - I mean you can't blame them for asking, but really!) - sometimes it's a trial. In fact, I think most people who do a lot of trade on eBay have had some terribly negative experiences. This can make one less helpful when people have issues.
Fourth, if this had been a full-size scarf, its MSRP would be about double what you paid. Although there are bargains to be had out there - even from reputable sellers on the tpf approved list - they are rare and often mean that the scarf is no longer in new condition (mind you, it might be lovely, but it also might have stains or pulls). Again, bargain hunting is for the very knowledgeable. I suspect that had the situation been reversed - had you paid far too little for an item that was quite valuable, and the seller objected to you - your feelings on this subject might be a bit different!
So again, if you were my daughter, here's what I would suggest. If you really do not want to keep the scarf, swallow your pride and if the seller has offered you a return, do it - and with good grace and courtesy (many eBay sellers - including me - do not offer returns at all). Chalk the $ up to experience. If she reported you for harassment, was that because you sent a number of emotionally charged e-mails expressing your dismay and even displeasure? Perhaps written in the heat of the moment and not your usual calm self? Re-read them, and if they were not e-mails you would like to receive yourself, send a short apology, explaining you are new at this. She may not be the most wonderful person on the earth, not the soul of refinement and courtesy and exemplary personal service, but it doesn't mean she is deliberately out to cheat people. She just may have an idea in her head about Hermes and what you could and should sell it for that, due to HER inexperience, is not yet firmly grounded in reality. You could also consider trying to sell it yourself on eBay (you will not get what you paid for it, I suspect, but it would be out of your life) or donating it to a worthy cause.
I do believe that most people are good, and wish to do right and be helpful - even on eBay. I have had some amazing and wonderful experiences with eBay. I've made some mistakes, too. Every single person who buys at auction - from the old pre-eBay days to now, has made mistakes and I think it's good to get it over with and out of the way now! But before you believe the best of people on eBay, you must truly know them as sellers. If you have a limited budget (and I do, too), it is critical to be even MORE discerning in whose auctions you bid on.
All that being said, I believe that learning about Hermes IS the process of learning discernment and refinement in everything we have and everything we do. Let this experience open new worlds of appreciation and education about both Hermes and eBay, and I wish you only wonderful experiences with both in the future!