A local LBS has a 30% sale on EVERYTHING.

I purchased a new helmet saving $80. It didn't matter that it was so new they didn't receive their first shipment yet, they still gave me 30% off.

When I bought my road bike, I paid cash up front and received 20% off. It was a very expensive bike and the 20% was more than enough to buy a second bike for trail riding.

Cash is king.. if you flash it, you can usually get a discount.