There are some models that are being sold on
ebay and other places for double the price of the same ones. Thus, one should carefully shop around and compare prices, as one can needlessly overpay for it on there, if one is not careful. If one is ordering from Europe (220v) for North America (110v), make sure that the proper voltage and plug is ordered since one doesn't want to buy an extra voltage converter and plug adapter. If one is looking to buy one, then one should get one that can at least give perforation measurements in full hundredths to be worth it. Perfotronic 2 appears more advanced than Perfotronic. Otherwise, why pay so much if one can buy a regular standard perforation gauge for a lot less money that measures in halves or quarters. Also, some perforation gauges can also measure in tenths like the Gibbons Instanta, Scott/Linns MultiGauge, etc. which don't cost as much.