Garage Sale Payment....

So one of my buddies is gonna have a garage sale next week, and i thought of an idea. Lemme get some feedback on this.
The idea I had is that for a discount off (thinking 25% off), one could pay in pennies. I figured getting a cheapo coin counting machine or those red tubes from Office Max to use in counting. Think this idea could work?
The idea I had is that for a discount off (thinking 25% off), one could pay in pennies. I figured getting a cheapo coin counting machine or those red tubes from Office Max to use in counting. Think this idea could work?