Matt,
Glad you found us over here. When you find a candidate you are interested in from purely a "looks" perspective, bring the info on the plane here and we will all chime in with things to look for. As for mechanics...can't help you up in the Puget Sound area, but Willie at Lake Chelan Aero is pretty good and honest and knows 150's (he has a beautiful example that he restored a few years back).
As noted....corrosion is the big issue with most older birds. This means pulling panels, looking, under/inside things, condition of the paint, glass, upholstery. There is a lot you can do.
The best advice I have seen from this group is to find a "buying buddy". An experienced aircraft owner to go with you to look at planes. One who will separate emotion from reality.
Good luck with it.
