yes indeed, i kinda did a research on it, most of the hot girls resides in TST area, normally those are china model types of chicks. the range is between 700-1300. Japs will cost about 1300. while chinese chicks about 800-900, but are really hot type.
in terms of papasan and mamasan, i encountered one in Jordan hotel, san diego where the lady (mamasan) came down, I asked to see the girl, but she told me you've already seen it in the net, but the girl didn't show up, that one cost 800, but I didn't go for it.