It depends on the seller ....... my 4280 was bought brand new in AUG 2007 on ebay - $999. I lucked out on his mistake of offering a 4270 (AFTER I bought-it-now ......... none were available from his source, I was told).
HE offered the newly introduced 4280 as compensation at the same price, delivered ! That's how I learned of the Kuro, by luck. Yes I registered w Pioneer, July 2007 build, zero issues so far.
I just watched the Olympic hockey at my dad's tonight (now his 4280) - it is still a finer PQ than 90% of the new HDTV's I've seen. (biased, yep!)