Well, considering there are dents and gouges in it, it would need to be turned, then rechromed. Turning it will reduce the original diameter so it won't be "original" anymore! Machining, then rechroming will add another $150 or so, probably more, so why bother to buy an original knob for $100, only to have to put more work and money into it, then lose points because it's not the correct diameter???
Looks like someone thinks it worth the asking price. Supply & demand.
Note that the current bidder has 4 percent of his bids with the seller! I find that interesting.
But as I always say, it's
your money. Do what you want.
Ed