I Want to rent/buy a car for May, June, July, Aug (~600 month)

Hi, Stanford student interning at Apple for the summer and I'm looking to rent or buy a car for commuting. Ideally, I'm looking for the dates of ~May 3rd - September 1st, but I am flexible on this. My renting budget is ~500-600 a month, but I am flexible on this too. My budget is around $600 a month for rental,

If you are looking to sell a car, either just for the summer or permanently, please let me know. My budget is up to $9,000 for a car.

I'm a fairly responsible individual and would take good care of your car over the summer as a rental.