This is always an interesting and informative topic for discussion. These are just my opinions based on my years of living in LOS.
Of course, in general, prices depend somewhat on the venue and of course. The girl's looks (attractiveness) also plays a major factor (but not as much as some would thing as prices are pretty standard). Attractiveness of the man is not really too much of an issue IMHO. It is more a question of if you are her "type." Being polite and especially being fun to be with go a long way in covering a little age, a balding head, or a little stomach paunch. The "got to have HER" factor also plays a role in how much one might want to dicker on price and one's willingness to walk away from a bad deal.
In general, as we all know, prices in Bangkok for everything, including pussy and cock, is more expensive than elsewhere in the Kingdom. The island resorts of Phuket and Samui would be next. These are the "upmarket" tourist markets and in general attract a more upscale crowd. The sex-workers in these markets take advantage of this and price their services accordingly.
Pattaya was, in the past, the cheap-Charlies destination of choice. However, this is changing very fast...Over the past 2-3 years, things have really gone upmarket with many new 4-5 star resorts, as well as flash new restaurants and nite clubs (lots of new Russian money coursing thru the town). Still, that being the case, Pattaya is still pretty cheap and good value for money.
I have not lived in Bangkok for over 3 years now and don't sanook there much now so will not comment on current prices there. In Pattaya prices I pay are:
Freelancers (discos, Beach Road pick-ups, shopping centers)
B500-B1000 ST; B1000 LT (The standard Beach Road pick-up (pre-police crackdown) was always B500 ST. I suspect this will resume after the end of the high-season in May.)
Lady-boy Clubs (
Jenny Star, High Boss; Mixed Go-gos and
Beer Bars
B500-B1000 ST; B1000-B1500 LT (Exclusive of a B200-B600 bar fine).
Some of the brothels on soi 6 have a few LDBs mixed in among their GGs (as opposed to Hi Boss, which is exclusively LDBs). I think I am safe to say that all these brothels have fixed ,and all inclusive rates (room and pussy/butt so to speak). Rates here run B700-B800 a session (until u cumm). In this regard, they are somewhat like soapies in that it's an all inclusive package, but the price is half or less than half the cost of most other arrangements. (That's is why you see so many local guys on this soi...very good value for money.)
So except for soi 6, prices range from B500-B1500 for LDB sex in Pattaya. I have never paid more than B1500 for any LDB, and that is always for LT.