Very High Hadrian Bid

It's a lovely example and someone wants it enough to pay for it.

$1400 is not rarity level in ancient coins.

It's a nice looking coin, but not for that price. At least two bidders want which is driving up the bids.

I agree the condition is good but you can get same condition coin for far less than 1300 USD. These types of bids on CNG sometimes makes me wonder if the consignor is doing some work to advertise his coins.(Not CNG but the person who consign the coin)

For $1300+ I'd rather be picking up something in gold, or a decent Owl or Julius Caesar. It's a lovely coin, but not at that price and not for me.

Quite a few well known auction houses (e.g. StacksBowers, Goldberg, Sotheby's) allow consignor bidding on self-consigned lots but it usually carries a hefty and somewhat punitive premium based on a separate fee schedule so as to make it financially undesirable to do so; or the consignor may be charged a fixed, non-refundable fee for every "own lot" bid. They often also require the auctioneer's agreement to such terms before the lot is called for sale, and the situation is disclosed to the floor bidders. This can be used as a (discouraged) way to "kill" an auction due to sellers' remorse (notwithstanding the hefty fees!) since it often discourages other bidders, at the cost of having to pay BP/SP and additional consigment fees just to win back an item you already own!!

This should not be confused with unethical shill bidding, which occurs when the auction participants / auction house are NOT aware that the consignor is self-bidding, or where the consignor has recruited / colluded with other individuals (unethical proxy bidders) to place bids on his or her behalf with the intent of driving the bid higher. The intent is usually to run an "underbid scam" where the shill bidder wins the item, then pretends to back out of the sale, and the item is conveniently offered to the underbidder for their (inflated) last bid.

Other auctions (Heritage, ebay) have strict policies against consignors bidding on their own lots to defend against shill bidding.

A third approach is sometimes seen in the fine art world and elsewhere: "preferred" customers "of sufficient means" who do big money business with an auction house on a regular basis may ask the house to place proxy bids on lots using the house line of credit, occasionally including their own consignments. This is not usually considered unethical if permitted by the auction house rules and is often used as a means of attracting publicity for both the auction house and the seller.

An example would be including, say, a Picasso valued at $3.5 million along with a consignment of some lesser works that would be interesting to art collectors or Picasso fans (sub $500k to $1.5m); the Picasso will inevitably be listed with either an undisclosed reserve well above its market value, say, $15 million, or, if needed, won by the house acting as a proxy bidder for the consignor. The idea is to bring more bidders to the floor and gain exposure for the other lots, where they will hopefully bid higher on those lots due to more competition and "excitement" -- the Picasso is basically an advertisement or a "lure."

It is much harder to detect shill bidding online, unless the shill seller is dumb enough to keep going on long enough for a pattern to become apparent.

You look at things like "same IP address always bidding on same seller", "high number of bid retractions", etc.