If you read the previous two paragraphs (caught you, skimmer), then you can already start to understand why buying a list is a bad idea.
These people have not signed up to receive your emails and, when they do receive them, won’t hesitate to hit unsubscribe or mark you as SPAM. Red flag for ISP’s. Email lists that circulate on the internet also tend to be of very poor quality and riddled with spam traps like fake addresses or ones that are active but monitored by blacklists. Sending your emails to these addresses will result in hard bounces or possibly being blacklisted.
If you’re looking to build a quality, opt-in email list, Sumo’s List Builder feature is worth a serious browse.
RE: Bunnypuncher Daily contest is over. It has been pointed out why. The bunny has been broken :(