Generally yes for the item itself, but check the warranty region and expect delivery in one to three weeks rather than days, plus a slower, cross-border return if something is wrong.
Not always automatically. Many small electronics ship with a universal or region-specific adapter noted on the product page — check the plug type and voltage range before ordering anything that plugs directly into the wall.
It depends on the item's failure-prone parts and the manufacturer warranty already included. For anything with a moving part or a battery, an extension is more often worth it than for a purely solid-state device.
Compare the price against the same accessory sold directly by the brand or an authorised reseller — a price far below that baseline on a commonly counterfeited item (chargers, cables, earbuds) is the clearest signal, more reliable than the seller rating alone.
