I purchased my wife's and mine on eBay so yes they do
Reasons were faster shipping (Amazon was saying 6-8 weeks on their site) and I can use PayPal. Since I have an eBay store (selling sports cards) I have a constant influx of PayPal, so it was easier.
I do think I paid about $20 more on each Kindle, though, but for me it was worth it.
Kev