Monitor 5s

Hey, we have an auction at work for charity and there is one pair of Monitor 5s up for grabs. Cabinets have seen better days, lots of scratches and a chip or two. How much do you think they are worth? $50 is what they are up too right now. Even if they are only worth $100 tops, it does go to charity so I'd be inclined to go even higher. I'm just curious what they are worth.

I tried searching the forum but no luck.

Thanks,