Is there any record of Warrior sudden wing failures at high hours? If so, I'd be greatly concerned about a 15,000 hr Warrior with totally original wings.
If there's no record of numerous sudden, unexplained, possibly-fatigue-related wing failures, then I'd be happy laying out the money.
Many aircraft have 30,000 hrs and more TT. A lot depends on whether there's any part of the design that could be subject to sudden failure, or whether the design gives adequate warning of impending failure, such as cracks appearing in critical components or stressed areas.
I'd be more concerned about how an aircraft has been flown and maintained than TT. It's a piece of delicate machinery and all machinery can be abused and mistreated, and only show symptoms of that abuse, after having been purchased, and after maintenance examinations then show up that abuse.