I'm not familiar with the R2000, but my guess is that it is an evolution of the R1800 and R1900 with which I started piezography several years ago and which have worked perfectly. The first thing you would need is a set of the empty refillable cartridges, but I see on their website that these are not yet listed for the 2000. These small carts, made for the smaller desktop Epsons including the 2880, are only $30 a set ($60 with a syringe set), then you buy the more expensive ink sets in bottles and use the syringes to fill the carts. The various ink sets in bottles (selenium, warm neutral, carbon, etc.) can be used for any size printer as long as you have the right carts.
With the low cost for the small cart sets, you can even experiment with split toning or different ink sets by buying an extra cart set and other ink bottles of your choice. When split toning, you must use the same shade number in the appropriate slot on your printer A chart of where to insert the carts in the right color slot of your particular printer comes with each set of refillable carts.
I've also purchased a 3880 dedicated to piezography so I can run different B/W ink combinations appropriate to the type of image I'm printing. The 3880 requires larger and more expensive carts, but also is easy to use. The print quality of the smaller Epsons using piezography, however, is just as excellent as the larger printers and much better than Epson's ABW system. Once you get through the details of getting started in piezography, I think you'll find it's the best way to enjoy B/W printing since the chemical darkroom.
The Inkjetmall website
has a live help box which you might try if you haven't received a reply from your email.
It's always a risk to buy a used printer, so be sure to do nozzle checks and print some test images using all the colors. Good luck!
Lynn