Two thoughts:
- You put a deposit down without negotiating a price? Of course, they don't want to negotiate. They have your money. You gave them the upper hand. When you go to ask for it back, expect them to make it a major chore...but it you persist, that is when they may start to negotiate.
- When you hear about people buying for x% under y, it's typically because they don't fall in love with a particular unit. You make a low offer. If they don't accept, you move on to the next rig. It's very effective but doesn't work if you are stuck on that one special unit.
