David, welcome to the club.
I think that the stigima of not having complete complete logs is a little overblown. Especially if the missing logs are way back in time. Most issues, if there were any, should have been worked out. My plane is missing the logs of its first 5 years but everything since is there. And you are right, even if the logs are complete there could be some fudging. Have a good pre buy inspection with a mechanic who "knows" the 150 if you can find one. If you find a nice plane and missing logs become an issue, maybe you could negociate a few $$$ of the price. Should not be a deal breaker. Just my 2 cents.
Jay
