For those who might be looking to buy used T560s based on this article. I bought mine new from Lenovo to my specification (FHD, SSD, 16GB, 92Wh, i5-6200, etc) at a great price and it has been bulletproof for well over three years now. I got lucky in the Lenovo "display sweepstakes" and I got one of their better display vendors (BOE), and a simple script available online changes PWM from 220 to 1000 Hz. Best of all, this was the last of the full-size chassis before Lenovo thought it was a good idea to make their flagship business T-models smaller and thinner that compromise everything.
I had a 30-day trial of the next-gen T570 with a smaller chassis, and the keyboard was terrible compared to this 560. Its 4K display was better and brighter, but really only marginally so even for photo editing, and its color temperature as-delivered was way off. That said, I might have otherwise ordered my 560 with the very good optional 3K display. The 570 had some small improvements here and there, but some major drawbacks mostly due to its shrunken chassis. And of course the annual Intel processor improvements that year-to-year are mostly for full-throttle benchmark testing. Just as the 560's Skylake processors improved on the previous year's Broadwell.
One can complain about the 560's SATA3 SSD interface, DDR3 memory, no Thunderbolt, all improved in the 570, but that's specmanship compared to the all-day keyboard, rugged full-size chassis with room inside for upgrading and good heat management, decent display, great battery life with larger swappable internal and external battery packs, superior Synaptics touchpad options, a better webcam and speakers.
Just saying that newer isn't always better, especially when Lenovo sees fit to compromise their historic business-class T-series to follow thin-and-light trends of hipster laptops.