Yes, it sounds like he worked you over on this one, especially since he also verified the price with your wife. That's two people telling him the same information, which he then conveniently forgot as he "accidentally" stole his "friend's" business. If you'd like to maintain the friendship, or some semblance of it, I would keep him at arm's length via future business-related responses that are as vague as can be. Or inflate future pricing questions by 40%. lol
I know lawn & landscape marketing, branding, and web strategy. I'm not anonymous, I just don't self-promote.