What kind of Assignment fee for $2500 contract?

[Demetrus Gibson]

Hey BP

I just put a deal under contract at $2500. So Im trying to figure how should i ask for an assignment fee?
A little about the deal...
It in the rough part of town. Not to the worst BUT close enough!

Here's the deal
There's 2 properties on one lot. With both of house the outsides are decent (needing paint).
The Main house needs a COMPLETE rehab. It is 95 percent gutted and has been re-framed. The other is a small 1bed/1bath house needs a rehab but not as much work. ( sink... plumbing paint...etc)
Prob. a simple question but... just asking.
Thanks
DG