Need free cgi shopping cart!

[SagaLore]

I have been looking around for a free perl-based shopping cart to use on www.hawgbuster.com I'm going to be signing up for 2checkout.com and need a shopping cart that can use 2checkout as the gateway. 2 have caught my eye so far... Commerce.cgi and I-Shop.cgi. I need something with flexible shipping rate options, which is why I'm not using the free 2checkout.com perl script.

Anyone with experience with these, or have any suggestions for others they've used?