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I say it's a new model. Do you have a chiseler trying to get it at the demo price?
I can see why a dealer might be a bit reluctant then to do a wet test....it depreciates the tub's value. Sure, if the person wet testing a new tub buys it, that's great. But if someone insist that you fill up the 2006 Flatulator 500 with the new waterfall, and then after sitting in it says "No thanks, I'm going to the internet to by my tub", you just lost several hundred dollars, no?