Reminds me of when I purchased my Sanyo plasma flat screen on clearance at Walmart last year. The guy in the store told me that the plasma TVs had to have the plasma recharged every year by a service tech and it was very expensive that's why they were not as popular as the LEDs. Geesh...I knew he was full of it, but I wonder how many people believed him when he told them that nonsense.
I go to the plasma center and have them draw some of my plasma to recharge my TV. Big cost savings over buying commercial plasma.