My First time ever posting to any forum, hello, signed up for my first triathlon for this summer, and I need a bike, I have an old road bike, and a good mountain bike, but I test rode a tri bike a week ago and it was pretty cool. After riding that bike, I am not looking forward to doing a twenty five mile road course on a mtb. I have been doing a lot of research on bikes and I am willing to spend the money on an entry level tri bike, but some of the deals you see on ebay seem pretty decent. I have seen a few stores that seem to specialize in selling used bikes online on ebay only. I don't want to mention any names because I am not sure if that is allowed, but does anyone have any advice or has anyone ever bought anything from stores such as these? and if so do you have anything to offer that could help me with making a decision?