Well, i buy nothimg but amazon these days. Have for years. We have boxes showing up on a near daily basis. Never really had an issue and returns are always easy. Easier when its amazon direct, but still not bad with the retailers.
Ebay however omg i could on on for days about all my problems over there. Both as a buyer and a seller. That place is a joke. I recently closed my account forever after an epic battle over an svs sub and a double charge thru paypal. I would avoid ebay at all costs.