Wanting Boa Size without Spending Boa Money

[Drevj12]

I'd like to start working up towards my ultimate dream of owning a green anaconda, and the internet seems to agree that the best step between BP's and corns and other beginner species, is the boa constrictor. I love boas. And I do want one at some point. But in my time doing tons of searches, I've never found very many reputable breeders with normal boas, and when I did, even the normals were up into $150+. Most places I found just had the $175-$200+ designer morphs. I could wait awhile and save up to get one of these, but everyday I research snakes, I find new ones that peak my interest. There are so many of these amazing creatures. So I'm sure someone in this wonderful community must have information on another snake species that grows about the size of a boa, would be reasonable to take care of, and can be had for let's say, $120 or less? Thanks for your time.