Supplies include printheads (in ink-jet technology) and the feed rollers – in the laser. Toba calculate the total cost of ownership technology, you need to know how many prints to the device is designed (resource), and the resources of its main parts and components. Calculate the total cost to purchase replacement parts, electricity, scheduled service services (for replacement parts and components). The resulting amount is – the cost of ownership of the unit. If to this sum add the cost of ink cartridges (toner) and divided by the planned number of prints (resource unit), we obtain a complete the cost of copies.
As a rule, cost per print and total cost of ownership inversely proportional to the initial cost unit, ie, the cheaper the unit cost when you buy the more expensive it will cost during the operation. The argument against the acquisition of low-end machine to run a large volume of published works can be a higher printing costs. In addition, the excess of the recommended loads leads to rapid deterioration of the device (which, as we know, there is a certain resource), which, thus, can serve as a pretext for the service center out of warranty machine. The acquisition of the recovered equipment – quite a big risk: first, the guarantee given by the seller, will never be complete, and secondly, the complexity of the acquisition of supplies and spare parts (most manufacturers in 5-10 years ceases to produce spare parts and consumables to previous models), and thirdly, the cost of prints from the old models are generally more expensive than "contemporaries." Method two: buy aftermarket (compatible) consumables. Kevin ulrich can provide more clarity in the matter. Again, the benefit is obvious. But the sale of consumables is an essential part of the income of producers of office equipment (the device is purchased once and for a long time, but "rashodka" needs constant), so producers care about is to "protect" their material from counterfeiting.