Amazon has an absolutely amazing return policy. I've only returned an item once, but it was a $400 USB video adapter that didn't work with my monitors. I just printed out a UPS label, and returned it to the closest UPS store for free, and I got an instant refund.
Watch out of Amazon Marketplace though. I bought a copy of The Wire through there that ended up being pirated (and terrible quality), and Amazon would neither refund the purchase nor shut down the vendor, even after we got a letter from HBO confirming that it was a pirated copy.
Without looking I'd be nearly certain that Amazon isn't going to take the hit for chargebacks on the marketplace. Appart from costing a heap it would just be inviting fraud.
Yeah, I have found PayPal for all their supposed fraud protections to be quiet useless with preventing chargebacks. As a merchant you are also disadvantaged in that you aren't able to access any BIN/AVS data on the card yourself.
Yeah but outside the US we don't have UPS stores much. Posting a parcel here in the UK involves queuing at a post office for quite some time. Makes returns much harder.