413914 Big Plaza

I would like to source clean alibaba clone script, with e commerce, shopping cart, classified section, Auction section - ebay clone, real estate,multi lingual, multi national, open source, and more...... I want the 5 best stand alone portals in one site. I require a shopping cart that can transact in product as well as cash or a combination of both. The site will function as a barter / cash exchange. My budget is limited,to $500.00.