you can get a 10 pack of them for $80 on ebay, or singles in the $15 to $20 range. Heck, you can get the whole GM remote start add-on for $160 --- and it comes with 2 remotes.
Can you link me to one of these ebay sales for the 5 button GM remote start / door unlock remotes.
Current Car: 2006 Grand Prix GT
Prevous Car: 1995 Monte Carlo LS