9 Computer e-commerce software to allow users to conduct electronic business transactions in online marketplaces via a global computer network; computer database software featuring a buy-back and trade-in and sale services for electronic goods such as computers, cell phones, laptops; computer software and software development tools for use in developing further software and software applications in the field of e-commerce; computer software to enable uploading, downloading, accessing, posting, displaying, editing, tagging, blogging, streaming, linking, sharing and otherwise providing electronic media and information via computer and communication networks featuring a buy-back and trade-in and sale services for electronic goods such as computers, cell phones, laptops; software for sending and receiving electronic messages, graphics, images, audio and audio visual content via global communication networks featuring a buy-back and trade-in and sale services for electronic goods such as computers, cell phones, laptops; computer software for the collection, editing, organizing, modifying, transmission, storage and sharing of data and information featuring a buy-back and trade-in and sale services for electronic goods such as computers, cell phones, laptops; computer search engine software; computer software for accessing, browsing and searching online databases; computer software for personal information management, and data synchronization software; downloadable application software for use in database management featuring information about buy-back and trade-in and sale services for electronic goods such as computers, cell phones, laptops, information on cars acquired by each of the dealerships, and information about a buy-back and trade-in and sale services for electronic goods such as computers, cell phones, laptops; computer software which lets a user conduct on-line, web-based auction and marketplace services which connects buyers and sellers of new and used electronic goods such as computers, cell phones