I have done but insist that they email me first to confirm payment (I accept only sterling).
You just fill in a little green slip at the post office for custims. It just has space for what the item is and a value. It's really no hassle at all.
The only problem I have experienced is a buyer who kept trying to pay me in $ which is why I have "overseas bidders contact me first to discuss payment options as I accept only UK Sterling" in every auction description.
dh accepts international bidders. he asks for payment thro paypal, international money order (in sterling only) or if they are really insistant will take cash in theirn currency but always asks for a bit more in case he gets charges to change it up.
I live in mainland Europe and buy a bit from ebay uk. I understand that the Royal Mail will cover you up to £28 if anything goes astray as long as you have a certificate of posting (free when you post the parcel at the PO counter). So for anything of a higher value it's best to insist the buyer pays for Int. Signed For with appropriate level of compensation. If things do go astray it's up to you, the sender, to put in the claim.
I've had quite a few things sent from the UK with no problem at all - they usually arrive well within a week.
I usually offer international signed for as optional insurance. I think it costs around £3.50. But that's because I refuse to take responsibility for losses where the buyer hasn't paid for recorded delivery!