[quote=@Sombrero]
How much money was the Argus team sent in with? Will we have to haggle it down, like the weapon guys?... Well, I mean, of course we will, but what numbers are we looking at?
[/quote]

Argus is the kind of classy, careful criminal who wouldn't accept a briefcase full of cash, he's more about wire transfers and offshore accounts. Cesare didn't give you a specific budget, so it's up to you whether or not you think five million is a fair price for what he's offering (one secret identity and a promise to work on the others). 

Of course, you could just grab him and beat Damselfly's identity out of him, spending no money in the process.