I see this question from two different angles.
First of all I'm probably one of the poorest members here on merb (which doesn't make me less of a gentleman/nice customer), so I can't afford many sps and I can't afford the most expensive ones. I have to choose according to my budget. I'd love to book Kelly Summer of Maria Divina, or the beautiful Sydney Lacroix, but 300h for and hour is just too much money for me. I'll go for them when the prices go down, if they do. I've had great times with Thalia at 160$ (I live in the near downtown area) and I always priorise Jessy's agency because of the quality of the service and the reasonability of the rates. 160$ is still A LOT OF MONEY for an hour of fun, it's easy to forget that when you drive a Mercedes (but not when you struggle to pay your rent). You can find good rates at Chloes, Satin Dreamz, Montreal Angels, and some girls at Eleganza, Good Girls, you know it (just trying to be fair to everybody here). Merbites are not the only clientele of agencies, we can't control what they do, but we can vote with our money. So like it's been said before, don't go past a certain price. I find the 200$ reasonable, but even that's a bit high for me. I try to stay around 160-180 and I'm happy that way.
On the second hand, I come from a domain where demand pretty low compared to the supply and our rates haven't been going up in many years (hence my poorness). I understand the fight of getting paid accordingly to what we're worth. That being said, value is hard to define. It's been only defined by supply and demand. Everybody needs a house, so plumbers and electicians will always have good rates. Everybody needs sex, and us guys have strong pulses for hot ladies (especially with the humongous amount of porn out there). We're addicted to women, we want more, hotter and more. Even most faithfull men will struggle with temptation, it's how we're wired. Providers will exploit this addiction, the same way any buisness will develop around a need (they don't even have to create the need, it's there already). Girls are in this buisness for money. I've read many comments of sps here that say they do it to meet gentleman and love their work. I believe them. However, the money exchange will always fuck it up (if I want to meet you, I won't charge you lol). If you make a buisness out of it, the relationship doesn't make sense, other than a buisness transaction. Who sais buisness sais negociation, direct or indirect, you can't avoid it.