Ollie,
Take note of what Trevor has said here. Be very careful when buying lists. I would never do it myself but as Trevor has also mentioned the best way to build a list "quickly" is to find someone who has a list and the same targeted customers as those you wish to sell to.
Your product needs to be top notch and ready to go whcih should also include a couple of bonus items to increase the percieved value of what you are promoting.
As also said, you will have to give the owner of the list a good 50% of the "profits" but make sure you also capture those names that do visit your site from the promotion/email.
If it's a property poduct there are various people with big lists and don't forget the property clubs. Promote there too.
Trevor, I think you may have to do the speaking on the 26th
Ashley Banfield
Ashley Banfield
"Start or Grow Your Own Successful Online Internet business"
www.onlinebusinessmarketer.com