CostumeJewelryWholesale.com is a monolith among websites, even more so ecommerce sites. In it's span of nearly 14 years online, I have been able to tweak it's Yahoo! Merchant classic RTML, to incorporate some Bootstrap and limited responsiveness. Working the backend of the store, I have added tons of products, edited pages and main pages. Incorporated some custom graphics and even CSS in places.