I'm not sure which REV the machine is but as the photo's detail there are a lot of upgrades, would estimate the machine is between a Rev. D-E. The machine has worked beautifully, but due to my build volume needs, I upgraded to a stacker 3d so this printer has to go...
Known upgrades -
V4 EXTRUDER UPGRADE KIT
Extra V4 CARTRIDGE HEATER
Metal Motor Mount
Extra V4 Filament Drive
Many Extra nozzles - Stainless and brass
Noctua Upgraded Fan
Dampners on Steppers ( Machine is very quiet )
printinz.com build plate
3 x Glass Plates
Additional Belts
Other upgrades that I can't remember

The machine is packed and ready to ship in its original box, will only ship insured. I mostly used PLA with the machine and it was a beast I can only hope my stacker is this reliable. The machine is tunned and is printing as accurate as a machine of this level can print. Please let me know of any additional questions you may have. I'm located in Bellevue, WA 98005 if a local pickup is an option. Sold AS IS.
Price 800.00 USD OBO, plus shipping.
Video of machine running the homing process - https://youtu.be/FN4b2Vfd6ks
Regards,
Shawn