Theres a one pretty big market in Mughalpura, under the newly constructed flyover.
If u dont know.. Mughalpura area comes in between Sadar round about and Shalamar garden..
Also there are too many points in buying a used bike.. take a mechanic along as u sound a newbie.. he wud charge u comission for buying u a good bike.. but if the bike doesnt turns to be good, u shud get work done from him at discounted cost.
Always keep approx. 10,000 rs spare for repairs.. no bike is flawless in used market.
plus im telling u! If ud go there by pre set mind tht i have to buy a bike today! U wud definately end up buying a bike which u dnt really want to! Used cars, bikes are nt bought this way... u gotta visist many markets and check for a good piece at acceptable rate!
Cheers, good luck!