My uncle has a beautiful arrow III in pre buy inspection. 7850TT 9 out of 10 paint and interior, 300smoh engine and prop, GN530w, aspen w/ synthetic vision, stec 55x, and GTX 345, and all the speed mods. Used as a trainer in the past but has been private owned and flown for the past 15. Test flew it it and dropped it off for pre buy. Mechanics obviously recommended getting the spar eddy current inspection done because it hasn't been completed yet on this aircraft. Well we were just informed one of the spars is cracked. Apparently to repair it, the wing would need to be removed and sent to a shop in Indiana for a thorough and most likely lengthy and expensive repair. My uncle really likes this plane and besides the bad wing spar it's a very clean nicely equipped arrow. Torn between walking away or re negotiating the price for the repair/downtime/aggravation/major damage history. What would you do? Need some insight on what to do next. Please dont respond with buy a c182 or a bonanza. He wants an arrow iii.