I have no clue what's it's worth and have no need for it but my bid is $5.
I bet you OP is going to say no, I PMed him and he said that in other forums he saw people bidding on such accounts for 100$, which is absurd.
Pretty sure OP lied to you, unless he has proof, the only reddit account I have ever seen sold on other sites for 3 digits was a guy who had 3 months left of gold and over 30k karma, do no remember the user though