In the scheme of things, do you prefer providers with small boobies and are older (40+)? If so, do you expect that they will be more affordable?

… like that, but I don’t have an expectation their rate will be less just because of their cup size and age.  To me it’s more about the quality of their service and overall appearance.  For example, one of the best providers I know has A cups and is over 60.  I don’t expect her to charge less the the going rate because of that.  

That is great to hear!

Agree 100%! Rates don’t seem to be based on providers physical attributes as much as their service level (ie what services they provide and, even more so, the level of “class” they provide). There are definitely people who do anything you’d want, but operate out of a sketchy motel and can’t carry on a conversation. They are cheapies, and they should be. People who appear educated, operate out of a nice private incall, are well dressed, understand hospitality, and know how to make a good bio…they can charge more and there will be a market, regardless of if they’re plus-size, over 40, or less endowed in the breast department.

Attitude,  cleanliness and personality will always win over big ones any day !!

Of course as with anything, beauty is a premium.  But rates seem to have a lot to do with work ethic.  Somebody who wants a steady stream of customers is more apt to have competitive rates.  
.
And sometimes it is Timex vs Rolex.  They both keep accurate time, their only real function.  I'm a Timex guy.

Older=less.  Boobs don't matter

Other than that, overall attractiveness and service level are what makes me willing to spend more.  Age range for me is pretty wide, as are other characteristics.