I just sold a co.uk through sedo last week. It all went fine and took about 5 days from the buyer agreeing the price and me receiving the money. However be aware of any fees - I received a GBP offer, sold in GBP, and received payment into a GBP account - however I lost about 4% in 'correspondent bank fees' from sedo end. So assume that whatever they're giving you after commission is going to be a bit less. So from a 700GBP deal they took 105 commission and I lost another 23 in correspondent fees. Quite a hefty chunk. Also if you don't have a VAT number they're going to charge you VAT no matter where you live apparently.
*edit as I type this I realise I'm probably saying 'don't sell your domains through sedo' lol