Anyone know why there aren’t any corexy kits for sale? They seem to be very popular in the hobby world right now, which made me very curious.
There are a few, but they’re not marketed as CoreXY, but they do use the CoreXY Kinematics. I’m actually considering putting the FB2020 out there as a kit, we shall see after the Conversion of one of my Migbot Prusa i3s.
XY gantry printers like CoreXY tend to cost more than Mendels because they need a lot more frame structure. And the people who know how much better CoreXY is than an i3 are usually competent enough to part out the BOM themselves to make something custom at lower cost. So there’s not much kit market potential.
Cheap kits go i3, custom one-offs go CoreXY.
I think that corexy is only worth producing if you are making something pretty rigid and accurate, which means you end up with a printer that has an expensive BOM and is expensive to manufacture and support. I would imagine judging by the BOMs/price ratios of the various top-end printers (Ultimakers, Lulzbots etc.) that a corexy worthwhile buying would cost in excess of £4000, which takes it to the very rarified top end of the prosumer market.
As Ryan Carlyle points out, right now anyone who wants a corexy printer knows how to make one. Or more likely, wants to design their own. Which is exactly what I’m in the middle of 
I think Pirate 3D’s printer was a CoreXY
I’ve built one using the open build parts v-slots for around 1100$ US with a build volume of 15 inch cubed. I am exploring sales at this point.
@Dani_Epstein The Craftbot Plus is a genuinely good CoreXY for $1100. It’s a bit of an outlier though.
It’s an interesting product, but does not have the sort of rigidity many corexy builds are aiming for. I’m not sure why they went for corexy as opposed to cartesian, given the design of the machine, but without much info about that printer it’s hard to tell what kind of quality and accuracy it produces hence the advantage of corexy in this instance.
According to the 3D Printing Today Podcast review, it gives stellar output. Folded sheet metal frames can be extremely rigid if designed properly.
That’s a really good price especially since it’s not even a kit. But I was asking about a kit