Bargaining over prices

I am looking to buy a used XR 250 or KLR 250 when I get to Santiago in a couple of weeks. Is it common or accepted to bargain over the listed price? If so is it similar to how one shops for a used bike in the USA?

Cheers

Matt

T.A.T.u. Amber Valletta Paris Hilton Victoria Pratt Shakara Ledard