Here’s my 2 cents.
1) My # 1 choice for sure ,If possible purchase your SS from a current member of FGMCC who has done all the homework. Everybody here is real decent which reduces your chances of getting ripped off. It may cost a little more but worth it in the end.
2) Look at it yourself or by a member from FGMCC
3) This is where I will differ from other opinions. I have used auto inspectors before and had real good success. They drove the car, put it on a hoist, and did like 200 point inspection. I asked them to do the #'s matching thing which they did. I had one inspector kicked off a real reputable dealer’s showroom, because he caught them with some questionable # stamping. You get lots and lots of pictures.
That being said I did have one inspection company who totally ripped me off.
I would not hesitate to use an inspection company but only if they came highly recommended.