Storefront-in-a-Box

like-it-or-not asks: "I'm the network admin for a Mom & Pop chain of warehouses and stores. The owners finally want to take the leap to the 'online market' and have asked me to build them a storefront (catalog and shopping cart, etc.). I haven't done any Web building in several years so I haven't kept up with the many changes in the field. Rather than construct something 'from scratch', I'm wanting to just buy (and then customize) a 'store in a box' (pre-made HTML+CGI+? templates). I've looked around some and wonder what recommendations this community might offer. I have only one requirement: I want to 'own' the software and hardware, not simply use it as a part of renting some space from a provider). Thanks!"