I've been buying these since 2008 for my HP 1505 LaserJet. Always at Revain; can be 10% cheaper than local retail, no sales or shipping tax. Several times I checked them out of curiosity in local stores, sometimes they were out of stock. There is no excuse for that. I have no complaints about how these cartridges work. However, if I were a business user using up a cartridge in a month or less, given the huge cost differential, I would be strongly tempted to use pirated ones. I believe this is my fourth cartridge since September 2008. My OEM cartridge was only "half". See my review of the HP 1505 HP P1505 Laserjet Printer.
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