Is Listsource the best list provider for multifamily?

[Andrew Hofing]

I am looking to start a direct mail campaign.  I would like to mail to out of state owners of multifamily apartment buildings.  I see a lot of posts about investors using Listsource to get their lists to mail to for direct mail campaigns.  Is Listsource the most affordable and best quality for getting my list of owners of duplex's up to 20 unit properties?