If you buy 2nd hand, do your homework. about a month ago i was loking on e-bay at a 2nd hand giant. got the make and looked on the net around bike stores and got the retail price. i put a bid on and decided my limit would be 60% of retail value, the bike was 3 years old. the last 10 minutes people went sick, the price was pushed up to 80% of the retail value. so do your home, set a limit and dont get into a bidding war.
one rotation at a time