<
http://www.printerworks.com/Printers/Laser-Printers.html>
<
http://www.printertechs.com/refurbished-hp-laser-printer.php> both
sell used HP lasers, these pages have good specs of most models. TPW
in particular has comprehensive part diagrams.
Rubbish. Older models are very easy and cheap to get compatible toner
carts for. They don't have tricky devices in them to make refills hard
like some newer ones. You can easily get carts for any HP printer ever
made. There really aren't that many different carts, the same ones fit
a whole family of printers.
There are maintenance kits from various repair and parts dealers (like
the above TPW) for the "soft" parts, like rollers, that need to be
replaced occasionally -- you may never need these but it's good to
know. These printers are fixable, not disposable like cheap modern
ones.
I got an HP4M for $50 a few months ago. New (in 1992) it was about
$1800, and the quality shows. Maintenance do far was just wiping the
grime off. I love it....
My recommendation: unless it's free, don't get an HPIII or older
model. HP4 and later are only a little more expensive, but are better
specced (600 dpi, faster), and of course a bit less old.
The plain numbers (HP4, HP5, HP6) are the standard ones, designed for
office use. The "M" models are Mac compatible; meaning they have
PostScript, which is very nice for PCs too. The "L" are "Light",
small, non-heavy duty use. The 4L is fine (for 50 or so pages a day,
say), the 5L and 6L are notorious for jams. The "P" are "personal", in
between the plain and L; mostly okay. The "Plus" are a bit faster and
have a few more features -- the 4+ is nice because it has a sleep mode
that earlier models didn't (pretty standard now). Other models (S, eg)
are usually for very heavy duty, maybe duplexing (print both sides).
Probably overkill for home use, but if you have the space and it's
cheap, get one.
Look for one with a Jetdirect card, which will allow ethernet
connection, as well as parallel. Shouldn't cost much more. Also the
amount of installed RAM -- it's not expensive to buy used on eBay, you
should have at least 6MB.