I am using Shopp on our site and it's given me nothing but problems. It just won't calculate shipping properly. It actually keeps giving customers free shipping for no apparent reason, no matter how I change the settings. Anyway, I'm now looking for a new solution, especially since Shopp's support is almost non-existent.
Does anyone know of a shopping cart solution that has the following?
1. Item quantity tiered shipping rates by Canadian region
2. Paypal checkout or Google checkout
3. Different tax rates determined by the user's by region
4. Ability to enter promotional dicount/coupon codes
Thanks in advance for any help that you can give me! :)