this has been covered before
a "veggie" massage is a uniquely Cantonese phenomenon - a speciality, you might say - and is quite sought after by connoiseurs. It involves using various vegetables, sometimes crafted in enticing shapes ...
... but trying to describe it is a bit like trying to describe a foot massage: if you've never had one, you can't imagine the feeling
The price indicates the skill of the practitioner, and like so much in Hong Kong, the most skillful girls (and the highest priced) are not advertised anywhere, as they only perform for a small group of private clients.