Tax Sales and Obtaining Tax Lien Certificates

[Spencer Herrick]

I'm beginning to learn more and more about tax lien certificates. Being new to real estate investing, I'm a bit unclear how they work, or more so, who's allowed to participate in them. I've noticed on my MLS that there are several forclosures. Would these be tax lien certificates purchased by real estate brokers? Can real estate brokers participate in tax sales? Also, how can I find out about properties that have tax liens against them before a tax sale.

Thanks!!!!