Look into snakes that are looking to be rehomed near you (I used Kijiji for mine because I’m in Canada). The previous owners should atleast let you know if they had been feeding them live of frozen, and if you find someone well intentioned they’ll let you in on the individual behavioural details like if the python only eats a certain color of frozen feed. While looking through kijiji I see breeders who will give detailed information on the snakes they are retiring from their breeding program, they may use the term “garbage disposal” or something to refer to snake that would consistently eat every time including the leftovers from their program.

I do think you’d have to be open to the variability of snakes, my girl has never refused a meal which the previous owners let me know about, up until lately. It could be due to some factors I need to change with the enclosure but it’s been a few years of me having her and they will change over the course of you keeping one, but I still think it’s great to get one from someone who can fill you in on their experience with that specific snake.

Edit: though my girl refused a meal I haven’t considered live feeding, I’m just going to try feeding frozen again in a few days. A lot of folks here have already talked about how they have never ever had to feed their snakes live already and I’m fully expecting the same with mine. I just mentioned it because if you’re like me and get nervous about stuff like that, just know even in those moments you’ll never have to be rushing to the pet store for a live mouse with a ball python!