Blood boa?

[Madness420]

so my local petco has 3 baby red tail boas and one is very pink. its beautiful i think. i am told after it sheds its much more red than pink and a guy who has 20 years experience with snakes said he thinks it is a blood boa. i've done dome research and i could see that being the case. i also read they only get up to like 7ft is that true? also i know that pet store prices are stupid high, and that can be said about the ball pythons and corn snakes at this store, but the red tails are priced at $170 and i have $20 worth of coupons so it would be $150 plus tax. is that fair? i really like the way this snake looks! dont know the gender yet getting it probed tomorrow.