Definitely bargain for extras if it is above your budget.
Some ml ask for above standard e.g $300 for part 3 in which i turned down. Then she asked, how much then? If i dont feel the vibe, just massage please.
Yeh definitely bargain if were talking big money like $300 AUD or u feel the girl is clearly trying to rip u off/overcharge u more than market rate.
But in Asia where its a difference of $10-20, probably not even worth bargaining