Ivy,
Since I'm up late, I'll hazard a few answers based on my limited experience. By morning, I'm sure the PROS will check in over coffee.
You'll read this over and over here: Don't talk with the CA, communicate with them in writing. While "good" and "ethical" ones exist, some have a reputation for being less than er.....willing to work with consumers.
In the last two months, I've had success with getting two medical collections removed: I paid them both (insurance foul ups). One I did have to communicate with the CA, but did it in writing.
The other, I backtracked to the OC (a hospital ER) and from there to the billing service, who was cagey at first, and after the a very rapid payment was made, I went to the top of that organization's food chain with a letter of explanation and a request for delete. I followed THAT up with phone calls until they were tired of hearing my lovely midwest accent asking politely for them to delete this.
From what I've read here, it seems that the general feeling is that medical things are more easily dealt with overall. If you're able to work with the original creditor (the service provider), all the better.
atlast.....not an attorney, not a credit maven, but the slope of the learning curve is lessening (grin)
Ficos 2/17/08: TU 551 EQ 534 EX 587
Ficos 2/12/09 TU 695 EQ 715 EX 715
Fico...4/15/10....drumroll.....EQ 743