You won't really be learning anything about your market or about marketing if you buy "ready made" leads.Also, the more readily available information is the more likely it is that hundreds of other people already have that information. 

As far as lien goes, it's timeline specific as what @Wayne Brooks expressed, if you want educated opinion, you need to shell out more information.

Just like I tell other people in my industry(mechanic integrity inspection/NDE) that get discouraged because of the amount of information...I've coined this phrase btw.  

There is so much information I need to process right now.  

We do however inform new tenants to write "Wrong Address, Return To Sender" on the envelope and stick it back in the box--this should eventually make its way back to you if any mail slips through."

I listened to almost all podcasts and they definitely add a lot of flavor to the subject and are full of great but most of all actionable information. 

He didn't seem too interested and I stopped trying to get more information.

Based on the information above, I think the property is overpriced.

Consult your own attorney who can review the condo association bylaws and give you an informed opinion as to whether or not the owner's interpretation of exclusivity is correct for your specific circumstances.

I'm struggling to find any information on that component, but I will continue searching.