I've ordered and sold 100's of stuff, so know what it's like from both sides. Ebay resolve problems quickly now, and you're covered by Paypal.

I've had items from HK/China quicker than I've had from the UK, and Royal Mail do mess up a lot more than people think. I received a pen after 6 weeks!!!! And yet got a package from HK 3 days after ordering

One week this year I ordered 3 things from seperate sellers and they all went missing .... strange it happened to be the week my usual postman was on holiday and the replacement was a young lad!