Comgrow is my go-to for Creality printers. Highly recommended.
I took a chance and bought an Amazon-return "Not checked, as-is, no warranty" Ender 3v2. Everything except a few non-critical bolts and nuts were there. It took about 10 minutes, once assembled, to figure out why it had been returned, and fix it--it booted up and would heat up, but none of the stepper motors would move. That's a sure sign that that the previous owner had flashed the wrong firmware version to it. Fixing it was as simple as downloading the RIGHT version from Creality, putting it on an SD card, and booting the printer up. Now I have a $300 printer for less than half the price. If you're not feeling that brave--or you're new to 3D printing--their factory refurbished printers are as good as new--sometimes better, in the case of the LD-002H resin printer I bought from them. It was pristine, worked right out of the box, and *didn't* have the over-curing issue that brand new ones were known for--clearly the UV lamp had been replaced as part of the refurbishment. I recommend them to everyone I know who's interested in 3D printing--you can't beat the price!