Thanks all for the feedback.
Firstly I am not too afraid for the FBI or similar. I own this name as part of a large portfolio and it is clear that I just have it to make money on the sale.
Secondly I have already had a reasonable offer (yes doberry, the name actually does have a resale value

. I know the other party has other names that he refers to sites with 18+ models so I'm okay to sell to him.
But now I was just wondering if anybody had an idea of the value of such a name, for example based on the traffic generating possibilities it might have.
Hans