Too many decent deals to mention them all, but a couple of examples are the complete Prisoner mega-set (10 DVDs) for $57 (much less than what others charge) and a complete history of England set for around $27. Check it out.
Link to the Prisoner set:
http://www.amazon.com/gp/product/B00005NKCQ/103-5565515-9051868?v=glance&n=130&n=0&v=glance
Link to the sale:
http://www.amazon.com/exec/obidos/tg/browse/-/579580/103-5565515-9051868
Link to the Prisoner set:
http://www.amazon.com/gp/product/B00005NKCQ/103-5565515-9051868?v=glance&n=130&n=0&v=glance
Link to the sale:
http://www.amazon.com/exec/obidos/tg/browse/-/579580/103-5565515-9051868