I think you are paying quite a premium for the genuinely younger girls, and to be honest I kind of prefer the older girls ;-)

Places like MOC do have genuinely young girls while many places that post about young girls area actually more like in the late 20/early 30 or even more often in the late 30/early 40 age range. Most non asian bros couldn't pick the difference, and will often estimate a 50+ WL as being in her 20's (I kid you not!).