I'm looking to buy a used GTS 250 or 300 and I'm aware recent models have ABS brakes, however most of those recent models are more than I want to spend. Most of the scooters I'm seeing are 2006-2012 - all prior to the release of ABS brakes. Question is... are there any notable differences I should be aware of between any of those models? Or should I just look for any year model with the lowest mileage???