There was a thread within the past 6 months about the 2120 and the various issues related to it. Do a search on "2120" and you should get some good hits. The price you gave is hard to guage without knowing the hours.
2120 pluses: total Shibaura product, been around along time, clutchless shuttle(?), all metal construction, that canopy looks nice. Negatives: no folding ROPS, older design/user interface, no loader (on this one if it is important to you), no warranty (looks like it is from a dealer - maybe you can negotiate a warranty), high exhaust stack (noiser/in your face).
I have seen another TBN user claim that mechanically the TC40 is the same as the 2120 - don't know that for sure. Pluses available folding ROPS, available deluxe 3ph, warranty, more tire choices(?), 0% interest financing, more refined user area, under chassis exhaust. Negatives cost of new, parts come from all over but are assembled in US (also a positive).
I can't speak to how this will meet your needs since you state none, but I bought used (with balance of a warranty) and I am happy. If I didn't find a warrantied used tractor, I would have bought new.
Good luck!
Mark