I have picked up a number of books on tax liens investing so I feel I have a grasp for the basic concept, but would be interested in learning more from more seasoned investors.I have close to $15,000 in "expendable" income I would like to invest.

I brought a contract with, but didn't even bring it out it cause I don't feel I have a good enough grasp on the ARV in that neighborhood (it's really low income, though it's a decent street in that area.)

That should give you a good introduction to how multi-units are valued, that is the biggest concept to grasp IMO.

If you can't master that and grasp the bigger picture I'd suggest you do something else, IMO. :)

I've had great response from people that have a much better grasp of cap rates and leverage from showing your misconceptions of these two common real estate concepts.  

You can plan your future with this valuable education.If you do not have the education and full grasp of the complexity of the real estate business, you are taking on a huge risk.

@Nicole Williamson - you have a good grasp of how to use the credit reports.

If you have nothing and the concept is completely new it might not be too bad of a deal, but if you have a fair grasp on the concept and a plan of action and you just need a helping hand with a few things it might not be as good a deal.

I am in the midst of a lot of reading but one thing I am having a hard time grasping is the idea of 'the market'.

It might be hard for her to grasp why you are so concerned about investing when our culture just buys whatever their creditor tells them they can afford.But, I guess I have to agree with Jon Holdman when he says it's just a fancy doo-dad...