We're talking about the little sterilite tubs. They are usually white and see through, but there are some opaque ones. I like the partially clear ones, I can take a peek inside and check if everything is all good before disturbing the animal opening the tub. Depending on the size snake you get depends on the tub size. Like, my adult male is in a 41 qt and he has plenty of room(that size is usually used for adult females who get larger than males) but people start babies in much smaller tubs
I know there are a few good breeders in different areas of florida, if you're willing to drive/have them ship you could get a nice quality healthy baby snake!
Pet stores can be both good and bad--I don't recommend beginners buying from florida because it's harder to tell a sick animal from a healthy one. First off pet stores over charge(I've seen $180 for a $40 dollar normal) and then if it's sick you also add on hundreds in vet bills OR just a dead snake! Oy!! I know I thought I could tell a healthy snake at first, but now that I have experience I can see much more subtle signs and know they are sick before they are REALLY sick!
Mites are a pain to get rid of, but the problem is you likely won't even see them if the snake has them! Then you get them home and see dead little bugs in the water bowl, and then you realize they are there! If you do get a snake with mites, pick up "Provent a Mite"..Best stuff out there. Got rid of all the mites my snakes had instantly after months of trying with other stuff!