I'm trying to do this for the very first time, but I keep trying number that are now disconnected.  

It seems I can only depend on the most recently posted ads, which means I'm dependent on luck that some who suits my tastes is advertising the same day I some money.

Be glad the numbers are disconnected. Typical scam ads. They'll scam who they can then disconnect the number, and show up a few days later with a new name, new number and new fake pics.

Rule # 1 for newbies: stick to reputable, well reviewd ladies. These ladies do not change their names, phobe numbers and pictures daily.

Get VIP here and search reviews for ladies in your area. Check out the TER ad boards. If you use BP, eros or other ad sites, check for reviews here or on other review sites.

Read the self help center here (top of the page by the life preserver).

One of the was one linked to here, that had a few good reviews.  

I'm afraid I can't afford the most reputable, which are usually up to $200 an hour.

Dude save up and try quantity over quality. I'm in the same boat you are. I have to plan and save for my excursions, yes I could play more often with lower priced ladies, but just not my style. You get what you pay for usually. Nothing like heading home thinking Oh my God I can't believe I scored with someone that freaking hot!! My experiences may be different than yours and my reasons for hobbying may be different as well. Like most hobbyist I'm married so its not about busting a nut, hell before I'd spend 100 bucks on some questionable booty I'd just rub one out myself. :0) I just like to drive a Ferrari sometimes instead of the Dodge at home. Seriously though good luck and I'm sure there are some fine ladies on BP I've seen some here who post some. But try my advice sometime and I think you will agree

Not quality of quantity, cheap is all I can afford to even do it once.  I actually don't like super model Hott that much anyway, I'm more attracted to women other call average.

Usually up to.....Say what?  If you are specifically shopping for LESS than 200 per hour you are going to be ripped off, scammed, possibly beaten up, robbed, shot, murdered, etc you name it.  That is just embarrasing.

.....Zsa_Zsa pointed out.  

  There is no shame, in saving your dollars, over a period of time, and investing those dollars in a reputable, and delightful date, that you know will not steal, leave early, etc.

  Just my .02.

Hugs and Kisses,
Kelly

In my area, there are lots of providers from 200/hr up.  Anything less is likely a scam, lesser time or lesser services...  or a LE sting.  Looking to bust as many as possible in short time, minimum effort.  
If you watch the most recent reviews for your local area, you have a good idea who is active.

If the numbers you are dialing are disconnected, and you are encountering that several times, you are not picking reputable providers. I would guess you are looking at young hotties with no reviews, that are quoting very low rates that fit your budget.   IMHO, yo u need to raise your standards for providers to see.  

My standard response to situations like yours is that you can look anywhere, including Backpage, but then do your homework/research on any provider you select.  Check the phone number, check the pictures, look for reviews, somewhere.  Remember, this is not the only review site out there, just the largest.  Per TER rules, I cannot name other review sites here.  Stick to well-reviewed providers, and depending on your  location, you might find some good ones for under $200, but they will likely be quoting a half hour rate instead of an hour.

I also suggest, one, if you don't have it yet, get a VIP membership here, and, two, save up until you can afford a higher priced provider.  Think quality over quantity.  We all have to do that to some extent.

Good luck,
Swim

http://www.theeroticreview.com/reviews/show.asp?id=215776

Was one I tried, turns out it's not Disconnected, she just isn't answering when I try.