Since you put it like that, $230 wouldn't be considered lowballing in my opinion, unless escort in question has very high rates or an inflated since of self. Business is business! I've never understood people that chase away legitimate business, potencial clients who very well may become repeat client and/or make referrals, or the opportunity to make "reasonable money" (it's not like you offered $20 buck for a BJ from a Pro escort!), unless they are doing SO WELL that they just can't be bothered, or a reasonable offer just insults them! That said, I have only made offers in the past when I've casually encountered men who were not necessary working or if so, I wanted to extend another hour beyond what was quoted. It really depends on the circumstances for me to just make an offer vs ask a quote. But that's just me. I'm sure others see it differently. Good luck though, all he can say is no, or not reply which is the same as "FUCK NO".