Are you buying from a store or from an individual?

From a store, you'd normally expect to pay what they ask. No reason you can't make 'em an offer, though. I expect that would work better with a small store than a large store, as the large store sales people probably don't have the authority to cut deals even if they wanted to. It might help if you could show the same bike was selling elsewhere locally for the same price.

From an individual, it seems tacky to me to arrange to go see it, and then offer a lower price even if it's exactly as described. If you want it cheaper, make that offer before meeting them- they may be holding off 8 other buyers willing to pay the full price.