thats not really that cheap for an ebay alarm, you could get cheaper. also another point to note is that if you get this alarm youll still need to use the original key to start the car as it has an immobiliser transponder in the key so even if you get the new key cut it still wont start the car.,.,
I wouldnt recommend trying to fit these unless you feel comfortable with electrics, so ya might have to and the labour cost onto the price.,.,
I dont mean to discourage you but they always make out like its a piece of pis to install but usually you can expect to take about 2-3 hours at least for the average joe.,.,.