because their completly different
the 110$ one retains all of the chimes and warning signals, the 10$ one does not
it has nothing to do with the year of the car, you can buy the 00 stereo harness for 10 bucks as well.. just go to a guy audio shop or search the internet... you dont need the harness that retains the vehicles chimes.. only difference without it is if your key is in the ignition and your door is open it doesnt go ding ding ding forever...thats all really...
find the 10$ one for your car, its out there.. i have a 02 gand am, same thing with mine.. mine was 15 bucks for just the straight harness.. not warning signal one