Depends who you are passing it on to? And what the item is?
I would never ask a finders fee when passing on a lead to a friends or fellow collector of a certain brand.
However, I may suggest a finders fee if I pass on a lead to a picker or reseller.
In the end, I'd rather be owed a favor than paid a fee... so most of the time there is no exchange of money either way.
I agree with Bryce. I'll add that if I was in this as a business and had a lead on items I wasn't interested in I'd pass the lead on to another trustworthy dealer or better yet some of my customers, or just give the owner of the items some names and phone numbers of potential buyers.
