An excellent question! In an age of rising gas prices and a weak economy, every dollar counts. The average family spends over $400 a year in toilet paper costs. Your Bwand allows you to keep that money and spend it on things you need or even invest it for your future!
There is also some anecdotal evidence to suggest that using your Bwand saves money on your water bill as it takes less to flush than when using toilet paper.
Please see the environmental page for more information on the many environmental savings, as well!