Your Questions About List Builder Control

What is a good web store builder that has the following features?

I am starting a web store , I already have a website and pay for the hosting and domain of the website so I am not looking for complete ecommerce solutions. I would like to have a powerful web store builder that allows full website integration. That way I can just copy the script and paste it into my pre existing website.

Other important features I need:

complete inventory control – I need to be able to enter the quantity of the product as I am listing and when people have purchased the total quantity , I need for the product to auto-hide to prevent people from buying an out of stock item.

High powered search and organization – I want people to be able to search products as well as browse through categories

Easy discount management – I am setting up a rewards program , so I want to be able to easily do coupon redeem codes and other similar features.

I need to at least be able to list up to 1000 products at a time , unlimited would be more ideal (although the prices of these packages are out of my budget as far as what I have found)

Customizable appearance of the store front so I can make it match my website.

These are the key features I am looking for , and I am of course looking for something that is affordable especially while first starting out. I am not looking to pay more than 200 USD a year at this time , I have found a few free ones but there are some features missing that are very important to me.

If muncom.com (which has full website integration and is unlimited product listing for free with ads)met with freewebstore.org (which has all the other features I need but no website integration plus costs 45 dollars a month for unlimited product listing) I would have the perfect web store builder for my new business venture.

Any ideas where to look for an online web store builder that meets my specific needs or if you know of one I would greatly appreciate your input.

Thanks in advance