Pick one that you think is pretty if all you're looking for is a pet. As Artemille pointed out, an axanthic male in that price range shouldn't be hard, but unfortunately they do tend to brown out significantly as they grow up. In your case, it would be worth it to shop around and check out how the parents look before actually getting your snake.

However, there IS always that chance you'll get bitten by the bug...which is why so many people are suggesting to get a female. If you do decide to breed later on down the road, you'll be glad you got a female. But...my two cents? You'll be just as happy with a male having gotten you started, if you're in it just for the joy of the snakes. My first morph was a male and I was stoked to have him. Yeah, I could have made more, sooner, if I'd gotten a female...but I was still thrilled with my male. He was still a great snake, and I still used him for breeding projects, just later on down the road. He was a great pet when I stopped using him for breeding projects, and made several appearances at educational programs and at the stores.

Buy a snake that you like, plain and simple.

-Jen