Domaingenius - i'd say it really depends on traffic. I get about 3,500 views, with a 6.97% CTR which means i get about £25 a month. Thats 200 domains, many of these are rubbish thou. I use Sedo because I do believe people are more likely to buy if they have confidence in a third party. Domain parking is only going to earn mega money if your domains are very very good!!
Nigel - your right mate, why do those dealing in dollars get the deal half price? If I talk in an american accent can I have half price too?
