Value of Black Widow?

I have a Linn Sondek LP-12 that I bought in 1980 that is fitted with an Infinity Black Widow arm (GF model, I think) that I am trying to decide if I should keep or sell. Due to kids, lack of quality listening time, decreasing hearing proficiency, new house, etc., I have not listened to any vinyl for a couple of years. The Linn has been sitting on a shelf in my cabinet. I have seen a couple of threads here commenting on the Black Widow. I was wondering if it might have exceptional appeal to a potential buyer or is it just another 20-year-old arm? The Orion Blue Book would suggest the latter. I would appreciate your feedback as to whether or not the Black Widow should be considered a keeper.

Thanks.

Brady