Hi, I am thinking about purchasing a Trek 2.1 as an entry level bike so I can get into cycling. Had a couple of questions first. (1) I found a used one that I like for about $750 that has about 4000 miles on it. Is that a decent deal or should I keep looking. Also, are there any major advantages to buying new? I've already rode the bike as a friend owns it and a lbs says that they will fit it to me if I buy my accessories there. Thanks for the help in advance. Much appreciated

Oh and it is a 2010 Trek 2.1