Hard Sell At The Dentists'

Two years ago:

For preventive dentistry, there is nothing that beats a Nightguard! You really need one too, the way you are grinding your teeth at night. Only $600.00!

Last year:

You are really grinding those teeth at night. You need a Nightguard! The records show you used to have one back in the 90's. Only $550.00!

Today:

You know, you really crater-in on those teeth at night. You really, really need a Nightguard! Only $530.00!

(Now, if only my teeth can outlast my determination....)