If you are leasing a POS system or credit card machine it can end up costing you ten times as much as if you purchased a unit. Leasing equipment can be a big money maker for your processor. Just make sure if you purchase a unit from someone other than your processor that you get one that is approved for use by your processor (some older models are no longer acceptable to process with because they no longer meet requirements). Most processors have a list of approved equipment that can be downloaded from their website or emailed or faxed to you if you call them. If your processing is offering you a "free" system, it usually means they are adding fees to your processing that will, over time, pay them back ten-fold for the unit they are giving you.