The person who help me has actually kept many in the past! Including Boas, monitor lizards, etc. He was also sure to tell me that a lot of the stuff in the kits aren't needed but was sure to tell me that a thermostat was needed.
I also owned a corn snake in the past, I bought him from a breeder and he was never healthythat's turned me off from a lot of local breeders.
All this being said, I am going to take the snake to a vet as soon as I can get an appointment to check him out to just be a hundred percent sure he's alright.
As for how I know he's healthy I meant seems, I checked for mites and he didn't seem to be underweight. But I'm not an expert. So I will be taking him to the local reptile vet for a check up. Thank you for the concern! I have seen how awful some pet stores can be. Also thank you for being nice. I've seen so many people tear into others over this issue.