I got mine from
http://go4it.freebiejeebies.co.uk and I only spent £5 on it (also open for people in the US, with offers that either cost NOTHING or about $9.99).
Sign up and complete ONE of the listed offers to get started, this will be the only money you have to spend- no spam from companies, no details beeing sent on like soem other sites. I can vouch for this as i've completed the site many times and received all the top consoles and an HDTV.
BBC and CNN approved the system, check it out
http://go4it.freebiejeebies.co.uk