Hello Mate
I use Ratedpeople which use to be called ratedtradesman until they changed it, never heared of the othe one. The way it works is you register with them then pay £40 a quarter and texts cost about £10 for 100, you decide how far you are willing to travel to a job; 10 / 20 miles or whatever then as soon as someone contacts the site looking for a plasterer that falls into your area, the site texts and emails the details of the job but not the clients details just say that someone wants a ceiling skimming etc, at this point all its cost you is the price of a text (10 pence) if you want to go for the job you call the number on the text or click on a symbol on the email, you are then charged from £5 - £11 depending on how big the job is, they only allow 3 people to quote on a job so its just the same as normal and its then up to you, they send you there details and you go and quote. I have had a lot of work from it thou its slowed down at the moment as everything has, you will get more jobs coming in if you live in a big city as opposed to a rural area and compared to other advertising its actually quite cheap. Hope that helps.
Johnathon