The seller on Ebay ended his auction because "the item was no longer available." What caused him to end the auction is not necessarily a sale for his asking price and only the seller will know what the actual circumstances were. Unless you have personal knowledge by contacting the seller it is just conjecture to assume the lot sold for $4200. Sellers close their auctions all the time for unique reasons.
I wouldn't assume too much at this point in time about this particular auction until more information is available as to why the seller closed the auction... Relax..be happy..