Buying from an independent seller on Amazon is similar to buying on eBay. You're taking the risk of not having the customer service that large corporations can afford.
Plus, Amazon customer support will often help out with claims where the seller is in the wrong (e.g. item does not match description).
No, that would be rather dull. But in terms of returning stuff you bought on the Internet, it pretty much is: https://en.m.wikipedia.org/wiki/Consumer_Rights_Directive_20...
"The current varying lengths of the withdrawal periods both between the Member States and for distance and off-premises contracts cause legal uncertainty and compliance costs. The same withdrawal period should apply to all distance and off-premises contracts. In the case of service contracts, the withdrawal period should expire after 14 days from the conclusion of the contract. In the case of sales contracts, the withdrawal period should expire after 14 days from the day on which the consumer or a third party other than the carrier and indicated by the consumer, acquires physical possession of the goods."
Never had a problem returning anything ordered online. Ok one should nonetheless read the terms before ordering.