If the scope is to determine if you have reflux... well, like you say, they're already treating you for that. With the scope they can see if you have any damage to the esophagus or ulcers in your stomach or a tumor, etc. I'm not a doc, of course, but I don't think I'd shell out $2,500 just to confirm what they already suspect & are treating you for. If you have other symptoms... symptoms of ulcers or cancer or someting, then it would make more sense to me. But I'm no doctor, so don't take my word as the Gospel.
The only problem I was having was the feeling that there was something caught in my throat... & I'd had that 'feeling' for years... since 98 or 99. A doc back then seemed to think it was all in my head, so I didn't go back for 6 or 7 years... enough time to actually erode the esophagus. Apparently that was night time or silent reflux all those years... never had heartburn or anything. More recently I've had stomach cramps and burping, but I think that is from the Pylori.
Jeepers, I feel like I'm falling apart!