rated:
posted: Sep. 8, 2008 @ 1:13p
varchar32 said:BEWARE RED TAPE PROBLEM WITH PANASONIC TH50PX80U! 
I had a bad experience with it and just returned 50" plasma to Sears 2 weeks after I bought. Suddenly a red tape line came up from the top of the tv screen all the way bottom and effected every input. I called Panasonic support and they confirmed that tv needs repair probably an PDP (plasma display panel) replacement. Since I bought it brand new from Sears I returned it back and got the full credit within first 30 days.
After a search online I found that this might be a common issue with Panasonics and probably the reason they are being offered cheap!
Here is the link to photos from my tv and and other complaints I found;
my tv's red tape problem
Avs forums complains
You need to improve your research skills. That posting from AVS forum is over 2 years old, for a 4-year old model, and looks NOTHING like the problem you had.
These are still current model year -- price is going down due to the over-hype of 1080p. The 720p models still being made in the current model year are moving slower, so prices have dropped to move 'em out. This may be the last year that any of the major makers offer plasma in 720p resolution.
IMHO if u r sitting more than 7'-8' away from a 50" panel, you will probably not see ANY difference between 720p and 1080p (all else the same). The Panny panels are the best bang for the buck right now.