Considering the mileage that is a decent price...I've seen some sell for around $4-5k with upwards of 100k....I bought my 02 in 2006 for $8900 out the door with 64k....
First of all, take it to a mechanic you know and trust for a once over and get his feedback. If that goes well, some areas of concern are the VTCS screws which were covered under a recall -
http://www.protegefaq.net/tsb/3005C.pdf (thanks to theMan for the link) - seeing you are in Jersey, check the following areas for rust...the doors (inside lower sill), PS strut tower of the engine bay, side skirts (both front and rear wheel well areas), rear quarter panels (where they meet the bumper), emblems on rear hatch. Another gripe has been the egr valve tends to get carboned up but there is a fix for that (buy the Canadian egr) and caliprs can have a knack for seizing....
I've had mine for going on 5yrs and have had good luck....other than normal maintenance (oil, plugs, brakes, tires) the only things I've really had to fix are one seized rear caliper and ther rear windshield washer pump went out on me (approx $40 and five minutes to swap). I've got some rust on the rear quarters, side skirts and engine bay but will be attacking that soon.
About the biggest complaint you'll get here is that it is sooooooo damn slow. lol That said though, the car is a blast to drive and to this day she still puts a smile on my face when I get behind the wheel.
I wish ya luck!