welcome to genvibeSeems unlikely to find an 2009 or 2010 below $8K, might be possible. There were a number of changes between 2003 - 2008 and the 09/10 models. Some prefer the new styling, I like the older models better, but maybe because that's what I own. The rest of this applies to the 03-08 modelsThe GT has a slightly different engine, which at higher RPMs (>~6K) a more aggressive valve profile kicks into give an extra surge of power, called lift. The GT's 6 speed tranny's top gear is actually geared lower then the 5 speed. THe extra gears in the 6 speed allow keeping the RPMs in lift range when upshifting through the gears.fueleconomy.gov says the AWD and GT got the same EPA ratings.. The GT requires a higher octane fuel, so the cast per mile of the GT will be higher than the AWD, especially if you hit lift a lot.The AWD is AWD, but there's a power loss as well as a mpg loss. Some here have had transfer case issues with the AWD, especially if the fluids are not serviced.The GTs, at least the early ones, seemed to have an issue with premature clutch wear. THe GTs did get all disc brakes, the other models have front disk/rear drum brakes.The early base 5 speed trannies have had a higher than expected rate of bearing failures, mine included, so I am reluctant to recommend an early 5 speed vibe to anyone, friend or foe.The base auto trannies have been fairly reliable, and while you do lose a little bit of power and control with the "slushbox", I think of the various models if I were to buy another Vibe I'd get an auto tranny one. I too drive mostly highway, but around DC I can hit some outrageous traffic jams, and for those times I'd really like the convenience of an auto tranny. Also, the money I've saved from the extra few mpgs my car has gotten by having a 5 speed doesn't come close to the cost of replacing a transmission. People here have towed various things with the Vibe. I can't remember the tow limit, may be only 1000 pounds. A trailer with a dirt bike should be ok.If you want you can look over the various owner's manuals before you buy (or if you end up buying one that doesn't come with a manual) from
http://forums.genvibe.com/zerothread?id=1010There are various options, such as sunroof, ABS, side air bags, but I would recommend getting one that has the "power package" which gives you cruise control, power windows/locks and remote keyless entry. You'll probably want those at some point, and it's a lot easier to get them with the car than to put them in later.