There's a provider I saw last year who I decided to try to see again. She's not advertising, and hasn't had a review since last year. I thought maybe she'd retired, but I sent an email to her last known provider email address just to see. She replied saying that she wasn't pursuing new customers, but was still seeing some prior customers. She said she'd be glad to see me.

but the amount is not out of line as many girls offer that same exact rate as yours. Just know that 3 hrs for the price of 2 hrs is not uncommon either. Since she's not doing new clients and might not desperately need funds, she could blow you off. OTOH, she might be busy and has not read your latest offer.  

Visiting this particular lady again, or negotiating her price?
Any time you attempt to negotiate, you must be willing to accept the possibility that you will lose your chance to visit with that provider entirely. I believe Mr.Dunphy has made remarks along those lines, as well.  

The first time I saw her, a ton of things went wrong. She was running late, but she sent an email to the wrong address. I arrived promptly, went to the door, and she was still in the shower. She came to the door in a bathrobe, with wet hair and no makeup. She didn't remember my name, and called me "my one o'clock". She didn't have the wardrobe I'd suggested, which was very simple and common. There were other things, too.  

I doubt that there would be a total of half an hour of actual sex over the period of three hours. I like to cuddle and feel and look and talk.  

The quickest way to ensure that you'll never hear back or be put on a lady's blacklist is to offer up something less than what she states.

But there are no real rules in this game.

I don't recall anything about begging for anything. Seeing someone a year ago just once and asking about being grandfathered in at her old rates generally doesn't fly.  

and if you have luck  negotiating with the ladies, more power to you. But don't come back and ask why your not getting a response when you attempt to do so.

I know they (and you) did. Thank you

If you had first confirmed an appointment, and THEN asked if your rate was grandfathered your chances would have increased tremendously. Now she most likely thinks of you as a "haggler" and unless and until she really needs the money it's quite likely you won't hear from her.

Email #1: can we meet? Answer was yes.  
Email #2: can we meet at 6 pm on Thursday the 27th? Answer was yes and date confirmed.  
Email #3: can we meet for the same rate as last time ($1300 for 3 hours)?

Next time don't be so quick to make that offer....don't negotiate against yourself.

and for the record, yes you did do things correctly and it appears as if you were properly rewarded.

I don't think so Bob.  This is a woman who's not advertising and not seeing new guys.  

And you said you have no experience with it.

They make offers. And things progress from there. Almost all will accept or counter, contrary to Mr. "Happy" John here.