Paying older RB's is a stupid way to run a franchise.
The idea is to get Edge in the first half of his career not the last half, same with ES.
We seem to be the worst team in the NFL at recruiting RB's, we just stink at it, although one of ours did go on to be good after we gave up on him, Thomas Jones.
I myself would concentrate on finding someone who can tell a good RB from a bad one and hire them as a scout and save myself a lot of money and get more production because of it instead of overpaying aging superstars to make up for the fact I couldn't find a RB if they were shaking my hand.