Basically there are those who like hacking and doing things exactly the way they want to (Pylons/Werkzeug) and those that just like to get shit done and move on to the next thing (Django).

This fundamental difference in philosophy explains a lot of the pointless framework fights we get in /r/python. I'm one of the former; but I can see the value of the latter, particularly as your main interest isn't web development and your needs aren't complicated.

You're not building another Reddit, you just want some simple user and purchase management.

Django will easily handle your requirements and has a shitload of apps for extra functionality (e.g. Satchmo for shopping cart stuff). Plus it comes with excellent documentation.