Flat panel HDTVs? I've seen plenty of good-as-new CRT TVs there -- right beside the perfectly good VCRs, record players, tape decks, and non-surround receivers.
That's a nonsensical question. Some sensible people will say no, but some sensible people will say yes. If your free time revolves around television and you make too much money, what's wrong with dropping an extra $300?
If it saves $5 a month in electricity, that extra $300 pays for itself in 5 years, meaning all the other benefits (widescreen, being able to carry a 42" alone, less space consumed) come free.
It seems to depend on where you live; I am used to Goodwills that sell most everything for a few dollars. I moved, and I went to the nearby Goodwill for a lamp. I couldn't find one for less than $20, and they were mostly broken too.
Goodwill was the first thing I thought of when I saw the headline. They have _horrendous_ prices on TVs. Before my current flatscreen, I picked up 2 decently sized CRTs over the past 2 years for free. GW charges $50+; I don't see why anyone would take that deal.