I've noticing some Goodwill stores (e.g. Seattle) moving from shopgoodwill.com to ebay. So, maybe each store is moving to find the site that most suits them. I've wondered if Fedex gives shopgoodwill.com a good deal, which may be good depending on where the Goodwill store is, and that this may be a factor. The Seattle store is very near USPS, UPS, and Fedex hubs, so they have more options.