We are currently looking to develop a collective group buying site similar to www.groupon.com and www.buywithme.com with some minor adjustments. Please visit those 2 sites to familliarize yourself with the concept and all necessary features

General requirements:
100% Open code/No obfuscation, bug free and secure
Easy editing and change of website upon handover

Admin:
Control panel to handle all features of the website including but not limited to the "deals", cities, users - consumers and businesses, forums.

E-commerce payment processes ready - credit card, paypal

Daily Newsletter to subscribers

Ability to allow users to post the deals they are interested in/ purchased in facebook wall and twitter

Referral reward program for all users who successfully invite others to purchase a product from the site

Automated issuing of coupons to successful buyers upon full receipt of payment via email

All pages features - similar to www.groupon.com so please go check it out

Please refer to attached pdf file

Parties who have already done launched such a website before are preferred, please indicate your fastest time of completion and bid asap as we are sourcing from channels both online and offline.Drupal CMS preferred, otherwise let me know what you are using, open to options