With mowers try to get something added on at a discount or thrown in with the deal. Plugs, oil extra blades or belts. I think my dealer has more room to play with the extras than the mower. BUT, remember that you have to go back to him for service, so be nice. I think it's OK to ask "what is the best that you can do", but than take it or leave it, don't become a jerk.
We give you leisure time.