Actually money-saving devices sell poorly if you can't provide hard numbers. If the product/service you're selling has an obvious benefit / fast ROI (for insta

Actually money-saving devices sell poorly if you can't provide hard numbers. If the product/service you're selling has an obvious benefit / fast ROI (for instance your customer can rent/sell it for more to their own customers, or save huge amounts on their business process), it's pretty easy. However if your product / service is just "nice to have" and "can save money / help sales on the long term" it's almost impossible to close the deal unless your product /service is so cheap as to not be a problem at all.