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PHPAuction PRO is an advanced Web-baserd auctions software. It includes many features packed into a robust package that offers complete user interaction and admin control. Advanced configuration features include the ability to charge sellers and/or buyers the following fees: Sign up fee, Initial Value Fee, and Final Value Fee. Payment gateway supported: Paypal.
Price: $222.00

Phpauction Reverse is the newest edition to the Phpauction software family. It has many features included making it a robust package that offers complete user interaction and admin control. Under the Apache/PHP/Linux environment Phpauction will perform with stability and precision. Phpauction uses MySQL as the database back-end for fast performance. If you need an auction without bid limitations, such as for job bidding or service oriented sites, the Phpauction Reverse auction package will do the job.
Price: $259.00

PHPAuction XL is an advanced Web-baserd auctions software. It includes many features packed into a robust package that offers complete user interaction and admin control. Advanced configuration features include the ability to charge sellers and/or buyers the following fees: Sign up fee, Initial Value Fee, and Final Value Fee. Payment gateway supported: Paypal.
Price: $359.00

Organize your Ebay Auctions online with this easy to use application. A Perfect application for your site. This application features over 15,540 lines of php code, a template design, real time UPS calculations, real time Ebay auction updating, and a complete admin interface. Very easily, you can install and customize this program for your purposes.
Price: Free / $74.95 / $149.95

Premier Auction is an online auction application written in PHP3 and MySQL. Features include: user signup, post items, featured and bold items, dutch items, simple search, advanced search, forgot password, online admin to add new main categories, subcategories, edit, delete auctions, edit, delete users, add, edit credits for users to post new items, admin can setup number of credits to charge for featured and bold items, image upload, etc. The application is based on fasttemplates making it easy to modify the layout. E-Mail the author for pricing details.
Price: Commercial

This bidding system is written in PHP and have the following features - User area:People can signup as buyers or sellers. Sellers (service providers) can post quotes on buyers requirements, choose seller based on their bids. Once project is completed, they can rate each other and provide feedback. Sellers have to pay membership (month,year,lifetime) to be able to bid.Buyers can choose where they want to receive their bids. Buyers and sellers can communicate through private project boards prior to accepting the project. Admin area:You can add, modify, delete any project, buyer or seller. Payments are received through PayPal and Linkpoint. You have to have cURL support for PHP installed on your server to receive Linkpoint payments. For PayPal payment to work you don't need anything. You can receive additional payments from both sellers and buyers to make them guaranteed, which will attract more jobs to them. Unlimited number of job categories.
Price: $250.00

The Auctioneer is a PHP program that allows you to run your own online auction site.
Price: $99.95

This reverse auction is an advanced hybrid elance type software. Highly customizable to suit your every needs without prior programming knowledge. Full accounting system, highly automated, very stable may be the best program sold online today.Service Area Buying Area,Transaction History, Deposit Funds, Withdraw Funds advance search more on site.
Price: $699.00

An auction script written in PHP that provides built in support for common payment processors like authorize.net, PayPal, 2Checkout and Verisign.
Price: Membersship

A German auction software (based on phpauction.org) with many new features (mySQL required).
Price: Freeware