My 2 bits worth would be,,
Hire a good reputable mechanic,, and then get real friendly with an owner that understands his 150. I would then take both for my pre-purchase inspection. Looking to close before purchasing doesn't exist,, but you do need to understand that under the best of conditions these little planes are on the average about 35 yrs old, they do have small things that on the surface may turn someone away but with someone in tow that will say or advise what the big ticket items are versus cosmetics would help, There are several on this forum that are very knowledgeable and may volunteer to help,,
