I you had 5000 digital products to sell, would you go with Yahoo Store or build your own ecommerce site in ASP.NET? (I set up a Y store yesterday and it seems you can't batch upload your products and database, so I would have to learn the RTML scripting to customize the site) - so am thinking why not build what I need. Thanks in advance!
There are lots of options between y store and a complete custom solution. I'd suggest checking out Magento