I have an HP Laserjet 3100 that I bought in '98. It also functions as a fax and copy machine... really handy. We decided to get it because it had all the features we wanted in a laser (600 dpi - the best at that time - ease of use with envelopes and various paper thicknesses and sizes, e.g. a flip switch for weird stuff like transparencies or card stock or envelopes). The fax and copy wasn't that much more $, when we compared prices with other lasers that didn't have those options. The kids use the copier more than I do.
Lately I noticed that it likes to suck in several blank pages at a time (somebody addressed that issue already, I think), but I haven't gotten around to playing with it. Most of the time all that paper just feeds right through like it was one sheet and almost never jams, so who cares, LOL. Other than that it's run perfectly, not one problem with envelopes ever. And it's in the same room as the wood stove... I blow the soot off the printer every now and again. :-]
I have an HP Laserjet 3100 that I bought in '98 . . . . Lately I noticed that it likes to suck in several blank pages at a time Me three--see my post immediately below yours.
I begged a friend of mine not to buy an HP with this type of paper feed. Did he listen? No.
Now he's got the same annoying problem.