What happened to MST3K v.10 DVD

[Bob Evil]

I found 2 vol 10s last christmas. 1 at best buy and 1 and circuit city.  I ended up selling one on ebay for 165.

Vol 11 is out and I doubt it's going out of print anytime soon.  I saw like 10 at best buy today.  Volume 9 is another story.  I'm not sure what's up with it but I do know an FYE by me that still has one left.  It's 69.99 though.