Integration secure payment

Hi all, I'm a graphic designer at GAF. I work only to create graphics for web or print & I can create static/display web page only. Time by time I got work to create small business websites which are selling some products online(like ebooks, video/audio training course, small software etc). I have to reject the work because Im not a coder. So I need some one who can integrate payment system(credit cards and other web money) in website & after payment an automatic code will send a download link to buyer(or send product direct to buyer's mail-I think its possible only if product is small enough to mail). The link should expire in 5 or 7 days(or whatever their requirement).One more requirement is to integrate video into web page(video will be provided). Web site will be designed by me you only have to full fill these 2 requirements. And you should available later to debug if it have any problem in future. I need quote for Per website. At now I have only one project & it is not in my hand so I need a quote to get the project. Show me your profile. Thanks for your time.