Thanks for your reply. I've spend a good deal of time going through the Avactis site reading all the info since your first post. Your cart looks to be very nicely designed and obviously you've put a lot of thought and planning into it.
Yes, the tags would work, but, I'll still be doing a lot of extra work entering each item into the database. Take this scenario (which is a daily routine)... I receive a shipment of 12 new vases, paperweights, etc. that I have to photograph and post online. After the pieces are unpacked and measured I photograph each one, edit my photos, then simply place them on web pages with quick links to add to the shopping cart. I upload the images, upload the pages and I'm done. With Avactis, it looks like I'd still have to create a new inventory item for each and every new piece that arrives. We're only a 2 person company and barely get everything done in the time we have already. Every extra step makes my daily routine longer.
My other big problem with the cart is I'd have to rename my existing pages to a php extension. Right now, all my content pages are indexed extremely well in Google. Loosing that ranking would be a blow to my business which has been online since 1995.
That said, Avactis still comes closer to my needs than any other carts I've looked at yet.
One other point I haven't mentioned before... UPS charges dimensional weight for air shipments (and even ground shipments above a certain size). For each item I have a single shipping weight. I'd like to be able to enter 2 weights: one used to calculate ground shipping, and the second for calculating air shipping. I would just estimate the dimmed weight for the air shipping entry. With just a single weight, either I lose money or my ground shipment customers are overpaying. Entering the box size would even be better, but that would be a programming nightmare trying to combine the dimensions in multiple item orders.