script for for ebay bidding alert

I need a very simple server side script: 1) an internet anomymous visitor writes in a web page form a) an ebay item number b) his e-mail address 2) after submitting them, he got a confirmation by web page and by e-mail: they both have a link to unsubscribe (=delete item number and e-mail) if he changed his mind 3) the visitor get an e-mail for every bid that ebay item will get. (I'd like to have this alert as soon as a new bid happens but I accept to have this alert on regular check e.g. every 10 minutes, if this is not a spam matter with ebay and if it's cheaper) 4) The e-mail contain alert for new bidding, the item title, a link to unsubscribe (=delete item number and e-mail) through web page and a link to a web page on my server including the e-bay item page in frames (two frames: top with banner, bottom with ebay item page) 5) when the auction ends, item number and e-mail are deleted my server envinronment is a shared server on hostgator I need the chance to insert ads in pages.