As in.. run 100mph the other direction. It infuriates me when people can be so horrid to someone trying to enjoy riding and lying like that!
If you are new to riding, do you have a trainer you can take with you? My advice would also be take plenty of pictures, and video and plonk it on here. Everyone has lots of advice and will guide you as best they can.
My second piece of advice would be to get the horse PPEd by a different vet to the one the seller will normally use; a vet will be able to tell you how old the horse is.
Yeah I agree with everyone. It's hard when you see one you really want but if this horse has health issues your going to be kicking yourself later.
If the seller is a vet and can't figure out why he is loosing weight it's a deeper issue that will probably only get worse and cost you wayyyy more in the long run. I've heard sooo many horror stories some of the "nicest" people sell problem/crazy horses to new people and its disgusting!
The vet not being able to figure out why the horse has issues with weight seems shady to me. I'd stay way clear of this horse, I agree with everyone else here. He has a sway beside the fact that he may be much older then what you can trust.
Yeah, I'd pass. The simple fact that the vet doesn't know why the horse is losing weight sends up red flags. That horse is going to cost a crazy amount in feed and even then he might not gain right. It might be something as simple as worms or needing his teeth checked, but then again it might be something serious that's going to cost a lot in the long run.
The sway back, in my opinion is not as big a deal. If you were just doing light trail ride, then he would probably be ok. But still, unless the horse just had an exceptionally good personality or something, in consideration that your a newbie, I would pass. Keep looking, and find someone that knows horses to help you look.