It's not just to save money on gas. I want something I don't have to worry about while commuting 50+ miles round trip every day to university, and delivering pizza. I drive 3k miles a month now, and will do more when I transfer to the local state university. For me, it is not worth spending $5,000+ to get a used car that has little or no warranty, and whose previous owner may not have kept up the maintenance on. I just had a minor break down last night, and even though the repair cost me under $10, the loss of income exceeded $100. Now, if someone has my preferred small car, the 1991-99 Nissan Sentra with a 1.6 and a 5 speed manual trans, with factory air ( need not work) for under $1,000 I will go and buy it. Otherwise, I would rather not spend good money on a car of dubious history in hopes that it will not break down and I will save some cash. I just don't have the time for everything mechanical in my life to be an ongoing project. As it is, my Cutlass consumes 20-30 hours a week, I work 30-40 hours a week, and in the fall, will be doing 10 credit hours in college with 2 "easy" courses-Introduction to chemistry with lab and Calculus with Analytical Geometry I. Add another 10-20 hours in to that for homework as well. I had to take the summer off to get the body and interior finished in my Cutlass, as well as demo the roof on my back porch and put up a new one. I would like to once again have a car that I do not have to worry about. If I don't buy new, I will try to push the Frontier to 400k ( 2.5 more years). At least I know what I have as I am the original owner. I will just have to invest $600 to get it back to 100% ( $153 per side for LCA's, $135 for a new Catalyst, $100 for a used steering box, an alignment, and a few other things I can't recall.) I don't care about depreciation for an appliance I will run until it dies, as I tend to keep most of my cars for over 10 years.
Another thing about new is that I can pay for it with the money saved in gas. I spend $550-600 a month right now getting 18-19 mpg. At 30 MPG, I will save more than the monthly payment. If gas continues to go up, I will "save" even more over what I would have spent on driving the truck, even though I will actually spend more money. So, it is a bit of a hedge against rising fuel prices.
:EDIT: Just found my all time favorite subcompact for sale for $1,000. I gotta see if I can find the money to buy it. It's a 1994 Sentra SE-R 5 speed. Not the 1.6 I wanted, ( SR20DE instead) but man, what a car! It's even my favorite color for those cars- code QM1 cloud white, so it matches the Frontier. I wouldn't have to get rid of my truck to afford the insurance, so it's the best of both worlds. I have been looking for this exact car at this price point for 4-5 years as it is one of my dream cars. Now if only my family will lend me the cash...