Yeah I wouldn't worry just keep your eye on the paypal page, you might be further asked to accept it, sometimes sellers don't realise this and the payment can be stuck on hold for ages till they click on accept :roll:
We have it on ebay sometimes if buying items over a certain value, it doesn't take long really and probably be sorted in a day or two till they make sure everything is legit ( I think they check out both the seller and the buyer and probably make sure the addresses are all ok and stuff )