Some things to consider for your checklist. Check the disks for the brakes and make sure they are airworthy. When I bought my 150,I did not check the thickness. I ended up installing two new disks. Another item,after starting the engine and doing a runup, pull the cabin heat on and see if the sound changes and check for an exhaust smell. On a warm day I did not check the cabin heat,as a result I had the pleasure of replacing both mufflers. One of the previous owners was an A&P/IA! Never assume an aircraft owned by that combination is squeaky clean. They often become quite "comfortable" with things that can go unnoticed by people who think the designations automatically guarantee the highest standards. I did not have this problem but a write up in a log book indicated part number so and so was replaced with new parts. The part numbers were for the left and right wing and that comprised the description of the work done with no further explanation! On some write ups,reference is made to the work description being on file at the shop with a minimal write up in the log book. Again,this may be a subterfuge. I may stand corrected on this,but is my understanding the work orders and description need only be kept on file for two years. Be careful out there and take your time.