Non Refundable Assignment Fee?

[Paul Gwilliam]

For all you wholesalers out there, I have a question. 

I'm looking to wholesale a deal or two, and I had some pushback from a buyer that hadn't heard of it before, and was uncomfortable paying an assignment fee up front.  

I know you can charge an assignment fee up front(obviously better for me), or build it into closing.  So here's my question.  Have you had pushback on the non-refundable assignment fee?  Should I accept that it should be at closing, or can I expect it up front? Does it just depend on the seller?

Thanks in advance for your replies.