How much below MSRP should we be paying for a new TT?

Here's my recommendation if you want to see the lowest price you could theoretically buy the trailer for:

Go to these 2 websites and get prices: www.rvwholesalers.com and www.rvdirect.com. You'll be shocked at the prices these 2 sell at. Factor in any shipping if that applies to your situation.

This will be your lowest price, even with their delivery charge added in. Next, use that as leverage in bargaining with your dealer.