Talk is cheap. Prove it.
I wasn't the one who tried to invest with Rossi, but I have no reason to doubt the Freeper who did. Perhaps he'll chime in on one of these threads.
His handle was B4Ranch. I checked his profile and he's been around about 10 years and had a decently extensive write-up of conservative belief in the profile. In other words, definitely not a throwaway ID someone made just to make a false claim on FR.
I didn't see mention of the amount offered, but I assume he's the person in question. It is a significant data point given that most skepticism centers on the notion that Rossi is doing this for money.
IMHO, money is not what makes Rossi 'tick', not from all that I know of him. I am not certain the E-cat is for real, but I'm virtually certain that the correct explanation is not that he's engaged in a financial con game. (There are other possible motives for an E-cat fraud which I won't get into here, but which are also tenuous.)