Check out Amazon for more great minifgures...
 
Includes 7 Minifigures and Green Goblin Jet Pack
Various Spiderman Versions
Green Goblin With Jet Pack
Doctor Octopus
 
Each character comes in it's own sealed package and includes extra parts/accessories.
 
*Note - This is not a LEGO product, but it is fully compatible with LEGO and all other major brands.