Not sure how you would define affordable, but most places near North York have standard prices. $40 for 30 min, $60 for 45, $80 for 60. Extra rates starting at $40, going up by $20 up to $80 or $100. (for the 30 min)
Then extra's rates go up by 50% for the 45 min, etc.
There are cheaper places in Scarborough but I did not enjoy myself as much.
My parlor of choice is Flirt spa, call/show up and ask to see the girls. So far all the managers have been good at their jobs, always nice to receive excellent customer service. (ya I know, not as important as having good mpas, but nice to have that in addition to a good session)
Hope this helps, and I'm sure other people in this forum can help out. Spend some time looking at different reviews.