I have found a couple of 1027's and I have a rule of thumb when I'm looking at buying a used one.
1. It needs to be less than 3 years of age
2. It needs to look like it is in good condition.
3. I will not pay more than $250 for it. The last one I paid $210 for a 2 year old machine.
With calibration costing around $100+- a few dollars, and then postage and
insurance you will spend on the average $150 to get a used machine calibrated. At last check you could by a new 1027 for around $500. I don't care much about the printers as I use a computer to read and print the report.