I'd be more surprised if he got $750 for a low percentage SD lavender albino not het anything. My guess on the price would be $300. Most people that buy SD want 50% or better. Caesar is 37.5% SD white albino tiger het snow and i got him for $400 but it was kind of a deal as the original snake i purchased had a pushed up nose so Kris didnt want to sell me it and it was his last one. So he upgraded me to Caesar for the same price. And Caesar is 31% mainland and he is 7' and 14 months old. He seems to have slowed down growing now as he hasnt shed in awhile.
Heck, you get a better deal on rats than me. I pay $10 for my jumbos. It costs me around $100 a month to feed my crew and thats not counting Harley the beardie who is a freakin hornworm junkie lol.