Two red flags are going off for me right now. I hate to be that person, but please- hear me out. I am a fellow math-loving computer science major in college right now and I had to make a decision similar to yours.
First of all, you said somewhere in your first post about looking for a good "deal". If money is an issue, you shouldn't be considering a pet. Parrots should be chosen based on research and bonding with you, not a price tag. Also, if money is an issue for you, you need to reconsider owning a parrot. They aren't the most expensive of pets, but their food and toys aren't cheap. These parrots don't seem to be from a reputable rescue or breeder if they are so cheap. What if they are sick and need to be given attention at the vet? Are you ready for that kind of vet bill? Sure, they are cheap to buy, but that might be an indicator of how sick they are.
Secondly, if you are planning to go to college, please don't buy a parrot unless you are 100% sure you are ready to give it up when you go to college, which would be avoidable stress to you and the bird. You never know what the future holds.
You mentioned MIT, which only allows cats on a case-by-case basis and this is extremely rare. I'm alarmed you haven't researched this yet. Most 4 year colleges, including mine, require you to stay on campus the first year, and 90% of college dorms don't allow any type of pets except fish. Please, please do not chose your college based on the pet policy, though. Education comes first.
If you are still insisting on getting a parrot, do not go with a sun conure. Where ever you go for college, a sun conure's screams will be deafening and your roommates in your dorm, building, apartment, house, will not allow it.
When I was 14, I fell in love with caiques, but I anxiously waited until I owned my own large apartment in my second year of college to buy mine (20 yrs old). I put the deposit of $900 each when they were hatched and I had the cage and everything before they came home. Money was not an issue like it was when I was younger. I researched all those years to make sure I will provide the best care and environment for them and to make sure they were a species that is best for me. I also made sure it was okay with my boyfriend- which is also another factor. It was tough to wait, but it was well worth it.