The Best of Star Trek: The Next Generation, Volume 2 DVD released on November 17, 2009.
ultimatedisney.com has a review up
130/6.04 Relics
125/5.25 The Inner Light
118/5.18 Cause and Effect
141/6.15 Tapestry
http://www.ultimatedisney.com/startrektng-bestofvol2-1036.html
looks like the same review is here too:
http://www.dvdizzy.com/startrektng-bestofvol2.html
ultimatedisney.com has a review up
If a $10 DVD is the only shot you're willing to give the show, then this should still do the trick. Please know that these episodes aren't what you'll always find, but they are standouts nevertheless.
Here again are four random episodes, all of them quite good but not adding up to a very good sampler when put together. All four come from the fifth and sixth seasons of the show.
I'm just not sure who's supposed to buy this. Half of the episodes are too atypical to serve as an introductory sampler and three quarters of them have already appeared on similar DVDs that committed fans are likely to already own.
130/6.04 Relics
125/5.25 The Inner Light
118/5.18 Cause and Effect
141/6.15 Tapestry
http://www.ultimatedisney.com/startrektng-bestofvol2-1036.html
looks like the same review is here too:
http://www.dvdizzy.com/startrektng-bestofvol2.html