Amazon has the Mel Brooks Collection as the "Gold Box Deal of the Day" today. The BluRay set is $24 and the DVD set is $22 (normal price is between $65 and $70).
In the collection you get:
The Twelve Chairs
Blazing Saddles
Young Frankenstein
Silent Movie
High Anxiety
History of the World - Part 1
To Be or Not to Be
Spaceballs
Robin Hood: Men in Tights
Grab it while you can.