Most of the bids that I get are within budget but some are 50 miles away, others have no face pictures.
Young and popular WG's don't have to beg for business, they will always be busy.
I guess it depends on your definition of young. I think the youngest good RB punt I've had was 23. Aside from Trinity ex-HoD I don't think I've had a great punt with a teenager - skill comes with experience IMO. It's the case of getting them old enough to be good, but young enough to be really hot.
What reverse bookings are brilliant for is finding those pro-ams, or the girls who only work part-time.
They often have crap profiles or no pictures, so you wouldn't contact them normally, but are happy to chat via email and send you pictures. These are the ones where you get undoctored, casual shots which give you an insight into her personality as well as a realistic view of her looks.
To me, these girls are the GFE holy grail, and the ones who are likely to still be there banging away like an outhouse door in a hurricane 7 hours into a 2 hour booking.