It depends on whether it's a 2 door or 4 door, which engine it has, the condition
( mechanical and body ), and which state you live in. You didn't indicate if you are trading this vehicle in or if it's an outright private sale. The Kelly Blue Book list the value at anywhere from $2,500 to $3,800. The value will depend on if you're trading it in at a dealer or if you're going to try and sell it yourself. The dealer will give you a lower trade-in allowance ( usually know as the "whole sale" value, because they must try to make some profit on your old car. If it's a private sale, you can try to get whatever you can out of your car. I'll give you the links so you can narrow the value down more accurately depending on where you live. Good luck.
http://search.aol.com/aol/search?query=What+is+the+blue+book+value+of+a+1999+Plymouth+Breeze%3F&s_it=keyword_rollover