Do you work at the moment? If not, then you can try selling a kidney. I heard they are going for a hefty price.
If you can't afford the deposit, then what makes you think you can pay off the student loans in a short amountil of time?
On a serious matter... If you somehow have 850 dollars, then I try my darn hardest to buy 2 glycine golden eye watches off mass drop's website. They are authenic limited edition watches that retail for 1500 dollars each. You can easily sell them for 900-1000 dollars on reputable and authentic watch websites such as chrono24 and jomashop (or even ebay that is a gray area).
I managed to buy 1 the first hour it was released on mass drop's website. I am already on my way to 600-1000 dollars profit. And yes I collect watches as a hobby.