There are some great sets out there where the value of the mini figures alone exceeds the price tag on the whole set. Here are some that I am aware of: 6857 Dynamic Duo Funhouse Escape - this is a $40 exclusive with 5 great mini figures. Great bargain! 6860 Batcave - Bane and Poison Ivy, Batman and Robin! Winner! 9473 - The Mines of Moria - This set retails at $79.99, but you will rarely pay that for it if you are a thrifty online buyer. This comes with 9 mini figures. The giant Cave Troll and Legolas are the high points here. 6873 - Spider Man's Doc Ock Ambush - Another exclusive set that has 3 great mini figs at $30. All 3 figures are exclusive to this set at this point. Anybody else please feel free to chime in on this and share the mini fig goodness!

Set 8095 used sells for around 18 used and the grievous figure alone basically sells for that.

The Grievous figure is very cool and so is the ship, but the other two mini figs in the set make it kind of weak. I wouldn't pay MSRP of $50 for it. But if I saw that set available for $18, I would definitely jump on it!

9499 Gungan Sub

...when the price drops. The Queen Amidala's minifigure is gold.

The new Jabbas Palace 9516 if you can get it at a good price

Agreed on both. Amidala is awesome, and I knew the second I looked at Jabba's Palace that that thing was a mini fig gold mine!