I started in the bullpens making 100+ dials a day selling software training and consulting. Next I sold SQL tuning software to Fortune 1000 and government accounts. After the first dotcom bust I started in real estate working with investors and developers. In 2006 I changed gears and started working for banks liquidating their non-performing commercial assets through auctions and brokerage. In 2009 I started distressedpro.com which is a platform for brokers and investors who access to institutionally owned distressed and non-performing assets. Today I run that growing business full time.
Personally I'd stick to optin pages and not listing pages unless you're marketing investment property. But that's "from the hip", the only way to know is to test.