While I agree with
@Arpit131 that biz and us both seem in decline as extensions, for us there have been 22 sales so far in 2018 in US according to Namebio. Among these are about 10 two word names. A few of the sales ZumePizza went for $2000, RugRentals for $750, DivorceAttorney for $500. SilverBank does have a nice ring, and while it won't be an easy sale, I think something low (to mid) $$$ MIGHT be possible if you can find a buyer. The fact that the net of the exact name only sold for $498 sets a limit I think on likely price.
I agree with range for SilverDealer that
@Arpit131 suggested.
While I have never personally had interest in biz extension domains, they do sell now and then. It has sold 23 times so far in 2018, with median price of $319, a few 2 or more words but most single word and short. I would price UsedThngs aggressively, like somewhere in mid $$ range, and it might sell as it does have a ring to it that makes sense with biz.
Good luck with them,
@jaggs