I had my horse receive endoscopy a week and a half ago to confirm that he did have stomach ulcers. I can't remember the exact costs right now, but I have the bill up at the barn so I will post back here in a few hours. The annoying part of endoscopy is the horse can't eat for 16 hours before, which often aggravates the stomach lining even more. I guess that is a necessary evil. From what I remember, the price killer isn't the endoscopy, it is the ulcer treatment. Treatment is 28 days of Gastrogard (administered once daily) and is about $950. After this 28 days, my horse will be again receive endoscopy to see if the ulcers are gone. Once again, I will report back after I go to the barn for the exact pricing for the procedure.