The company I am working for has several printers that are probably 4 or more years old. They're all higher-end laser printers, some of them are color. They seem to have problems all the time, though we can usually get them fixed for a while before more (sometimes the same) problems arise. My question is, when should we decide to replace these printers? I've already replaced one because we could get a new one that did the job for almost as much as the cost to repair it. The replacement's not as good as the old printer, but like I said, it does what we need it to. The printers in question are a Lexmark black & white and two Tektronix color laser printers.