Similar sale: shrink.net $2,800
That may seem like a lot but since the .net only sold for under 3K, I'd say your .one is worth less a lot less, you'd be super lucky to get $280 for it, in such an odd extension (note I like .one but use them for fun projects I've sold some before). Even that being I would not renew it more than once, I think .one is $15 renewal now I would not do anything crazy like renew for 5 years or anything. Just my thoughts that it's worth between $50 to $280 and even then hard to find buyer.