What is your reason for looking at second hand televisions?
The 34xbr800 model is Hi-scan resolution versus super fine pitch, and not being a KD model it lacks an ATSC tuner. It lacks HDMI but would take a picture from HDMI via an HDMI to DVI converter. It should display a reasonable picture but there are better models out there.
It is hard to guage the value of these things because supply and demand is so low. But I see someone is selling a 34XBR960N, the very best model, for less than $200. A 960N should be worth more than that, but people just don't want CRTs anymore no matter how good they are.