I currently use 1shoppingcart and it's been good but because I'm outside of the US support takes longer to get access to as often I have things I want to know during my business hours. I expect for you it would be ok.

Wahmcart - I was going to join them, but again, I found with being outside of the US there were some limitations which didn't work well for me.

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Kathie M. Thomas, VA Coach
A Clayton's Secretary, VA Blog