I like CookedTick's suggestions. Do some of the affordable stuff first. Maybe even a headlight polishing kit first to see if you can restore yours. Spend some money on good quality cleaning/polishing type products. Touch up paint. Maybe check your local classifieds for used wheels. Even new can be had pretty reasonably from a place like Discount Tire Direct. Tinted windows can usually be done for a couple hundred and make a difference in looks and function. Is there anything that needs replacing like fuel door, damaged taillights/reflectors, missing trim, door lock actuators...? Is there any leaks from the valve cover? New quality floor mats usually dress up an already clean interior. How are the speakers? If you don't have power locks, and have a little experience wiring, I'd highly recommend a power door lock kit. Maybe even consider socking some of that money away for a future repair?