Trying to get a car back on the road to sell but I want to make sure I'm not setting anyone up with a lemon so I've been going through it and fixing problems and potential problems. I'm now finally doing a compression test before going any further. Here is how I conducted the test and my results.

I warmed up the engine so the temp gauge was half way between cold and hot.

Took out 25 amp blade fuse and pulled the 15 terminal on the coil. Removed all spark plugs.

Inserted tester, screw type, into cylinder #1. Cranked 5 times and got 150. Repeated the same on all cylinders. Cylinders 1,2, & 4 all read the same and acted the same at 150 with a quick jump on initial cranking. Cylinder #3 didn't jump as quick and after 5 cranks it read 120. I then mowed the lawn and did some other things. I read the FAQ section and returned the car and performed a 10 crank test on cylinder #3 and it read 150. I did the same with cylinder #1 to see if the cooling down of the engine changed the reading. The engine was still a bit warm. I got 148 on cylinder #1.

I'm confused. I read somewhere that 5 cranks was the correct test but then read 5-10 cranks from the FAQ. Seeing that #3 is taking longer to get up to 150 but does reach it gives me some hope but I'm also leaning towards possible valve damage. Does that seem like the correct conclusion?