Hey all! I wanted to give you an update on my search for an used S64... and no, I didn't buy the TH-85VX200U for $35K.
I took a chance last week and bought a broken 50ST60 from Craigslist which had the infamous 7 blinking light error code for $50 CDN.
After taking the back of the TV off and running through the Panny trouble shooting guide (many thanks to TW2005 for posting the guide and the all folks from this thread = Master thread for Panasonic plasma not turning on
), I was able to conclude that I needed to replace the SC/Y-Sustain board.
I ordered an used board for $51.23 CDN, shipped off of EBay and it arrived today.
I promptly installed it after work and voila, the TV panel turned on and displayed all the start up images!
I haven't had a chance to see if there's any burn in (the previous owner was a gamer) but I haven't noticed anything obvious. The kids are watching "Book of Life" off of NetFlix right now so I can't even check the hour count, firmware or picture settings, hah.
Right now, Cinema mode looks amazing and for $101.23 CDN or say $80 USD, I think I scored a deal and got the upgrade I wanted and then some!
Thanks again for all you folks who recommended me to stick to my search for a 60-series as it certainly paid off.