best e-commerce on rails?

Greetings -- I need to set up a shop online and I want to use Rails.
However, most of the top shops, e.g. reviewed in

-- are PHP-based. Shopify is reviewed which is a hosted solution, not
my own hackable rails setup, and ActiveMerchant is mentioned which is
just a payment processing package in Ruby, a part of Shopify, along
with Liquid templates -- still not a turn-key Rails solution. Are
there any out there?

google "substruct"

a free rails ap based on shopify

Check out Spree (formerly RailsCart):


Also has a base Rails app that comes wired to do
recurring billing.