My simple negotiating tactic...
Step 1 "Is this the best you can do?" If yes got to step 3. If no go to step 2.
Step 2 "What is the best you can do?" Find out his offer and go to step 3.
Step 3 Decide whether I feel it's fair and buy or walk away.
No badgering. No comments if I think the price is too high. Just a simple question and a decision. I will sometimes see if they can do better by bundling by just asking.