by RetireeJay » 2017-Apr-Fri-16-Apr
Do you know how much the Plus was used before it was offered for sale? And why the current owner is selling?
The plywood Plus has served a lot of people on this forum well, including me. There may not be much difference in quality between older units and newer ones regarding the smooth rods and the stepper motors. A metal frame is, of course, more rigid than plywood - but also harder to modify. If the unit you're proposing to buy still has a Ceramic Ubis, then you may find that you want to upgrade to an E3D or Ubis 13S.
The Plus in your picture does not seem to have a bed-leveling probe; in my opinion that is a good thing, but probes are pretty much the accepted state of the art now.
A lot depends on your skill levels at both hardware and software. Buying an older unit will almost surely come with some challenges, but the design of the plywood Plus makes almost everything "visible" so you can experiment, tweak, debug, and fix it yourself.
Printrbot Plus operational January 2013
Brass threaded rods (5/16" X 18) & nuts for Z axis
GT2 belts & pulleys
Cable chain to reduce probability of fatigue failure in wires
E3D V5 Hot End, 0.4mm nozzle, also 0.8 and 0.25 in use occasionally
PB fan mount + 40mm fan -- using printed mount adapter, not the E3D supplied fan
Injection molded extruder gears
Optical Z "endstop" (custom designed and built)
Have used many pounds of T-Glase filament. Now also doing some work with Ninjaflex SemiFlex
Print on glass with Scotch Craft Stick or other glue stick
"My next printer is..." Prusa i3 MK3, upgraded to MK3S