I still got an Arsenal SGL-20 61 NIB. I don't need the money but I just might. It's got 3x Circle 10's and 4x 20rd Hungarian Tankers. I just can't bring myself to shoot it.
Friendly question - why do you keep it? If you bought it as an investment there's never been a better time to cash in. You clearly didn't buy it to shoot it Saving it to pass down some day? The SGL-20 was basically a factory converted Saiga that had a few quirks and issues with some assembly runs, until Arsenal came out with the more well known SGL-21. Still, they seem to be more rare than the 21 series and would likely fetch a relative fortune compared to what you probably bought it for.
I get not selling things for the simple sake of profit - my Arsenals have easily tripled in value from what I spent on them, but dang if I don't enjoy shooting them all. But I do feel bad that poor 20 never gets any use!