Received a call from a firm?

[Jason M.]

Forgive me for the possibly naive question. I recently put my rental property back online for rent and have received a few calls for it already. One call in particular was new to me.

A gentleman called me asking questions about the house, saying he worked for a firm of some sort (I hate myself for not writing it down at the time). He said he finds rentals for tenants and needed more info on my rental for his own posting of the property. His questions were innocent enough. Nothing that seemed weird to me.

He said he wasn't an agent or a broker, he just works for a firm that finds rentals for others. He also asked me that if they found the "perfect tenant" for me would I be willing to pay a finders fee. I declined to comment on that one since I wasn't sure the proper response. I'm just curious what kind of firm does that, who isn't a realtor? 

Thanks.