You can have quite a good outcome with AW RBs. There is a thread on here somewhere which goes into some detail on it. However, some general tips:
- take some time over what you write. Say what you want and don't want. (You'll still get a lot of bids from girls who haven't read it but it does cut them down)
- outcalls to nice hotels get better responses than incalls
- you may well get some bargains
- worth setting up a separate Hot List for those who bid that you fancy as the bids disappear once the ad expires
- just because she bids doesn't mean she'll still be free. You need to communicate to confirm not just accept the bid
- I had a lot of success and fun for outcalls to London hotels - a lot less for incalls in the West Midlands
In any case it'll only cost yo a bit of time and a couple of quid
Good luck