Hi my friend,
I can do it for you. I already built an online shop like what you require. If you offer this project for me, your shop will get beautiful template , integrated shopping cart, shipping options, tax, also integrated yahoo and skype with your shop as you request. Also, when customer buy your products, they will be charged by third-party gateway such as paypal. Your purchase will be sent to you to let you know who buy your product.
Please choose me, and I will make you happy with your right choice