Do yourself a favor and wait for a garage queen with very low miles and a meticulous (read anal) owner to come along who must part with their baby or dream ride.
Also, be willing to buy it from across the country and have the car shipped to you... SoCal boxsters will probably go for more than those that have been sold to people in the north or on the east coast where the car is only driven during summer months. And now is about the best time to be shopping for one of those winter Boxsters. January is a great month. You can always hire a company who will check the car out for you or the owner will usually be willing to drop the car off at a dealership for a pre-purchase inspection if they're stand-up people with nothing to hide.
Then insure you can put a grand or more into the car each year to either repair it or enhance it if it's in good running condition. You'll buy a rear set of tires a year with weekly use, and the oil changes aren't cheap, although you can go longer than a fossil-based oil'd car.
I hope you find the best Boxster that your budget can buy! We all look forward to pictures of it the day you take possesion of it.
