I have 2 alarms that were warranty returns and upon inspection the only thing wrong with them was the purchasers can't read a user manual.
One of them was installed for only 2 days, the other 1 month. Consider them 'floor display' model in terms of their general condition. A Perimeter sensor, battery back-up siren and factory installation harnesses can be purchased as well.
Web Bike World Review of the T-3300 series alarm
$80 ea. Brad @ 778-881-7715