SiteXPro leads seems legit, Buying Leads and cold calling

[Joe Payton]

Friend led me on to this site. Curious how legitimate the leads (Pre-foreclosure, tax-delinquent, & absentee owners) will be. the Salesperson seemed to know what they were talking about. Wanted to get y'all's professional opinion. 

Are these good leads?

What's a better place for buying these types of leads?

Thanks