I'm never going to pay for a texture pack. The concept of doing so is beyond me when there are plenty of amazing free packs out there that you can customise yoursf to suit your tastes.
Secondly, 'custom texture packs ' may only contain a handful of custom textures, the rest stolen. Especially with these textures, I feel that I can edit them myself- and infact, anyone can with basic picture editing knowledge.
I personally wouldn't pay for a pack if it wasn't 100% original, because I could find the original downloads and have half the pack already.
Anyways, this was just my opinions c:
Good luck!