I tried it once for an outcall to my hotel. Did have a few interesting nibbles but I dithered and by the time I decided to go with the best one she was otherwise engaged
Interestingly some girls bid from further away like manc and were willing to travel to Leeds.
Top tip is not to wait for closer to the day - if you get a good bid early doors accept it.
I did get quite a lot of mutters bidding too
Other tip is to specify clearly what you're after - age, build, etc.