I don't think so. The phrase "purchased for resale" is a term of art: it means products purchased wholesale (without sales tax) by retailers. It doesn't appear that a consumer buying a product and later deciding to sell it on eBay is covered by that clause in the terms.

http://www.businessdictionary.com/de...or-resale.html

There's nothing in the terms that excludes failed attempts to sell an item on Craigslist. It was in the OP's possession until it was stolen; obviously it's covered by the terms. Of course a claims agent may not agree but in my experience with AmEx they are not as picky as Chase is about trying to deny claims.