Just a quick comparison.
Dark Eldar Wyches. A 92 piece plastic kit that makes 10 models, you've got options for the sergeants different load outs and the different special weapons for the squad.
Currently retails at £18
Dark Elf Witches. A 67 piece plastic kit that makes 10 witch elves OR WITCH ELVES WITH DIFFERENT HEADS AND ARMS!! WOWSERS! Sorry, I mean 'or 10 Sisters of Slaughter, the totally different unit'.
You've got the components to make a champion, musician and standard bearer.
Retails at £35