Coin Terminology and Glossary

The Coin Collecting Dictionary includes 546 titles used widely in the coin collectors community, and has received over 971753 search inquires.

Selected title: Shill Bidding
Explanation: A 'shill' is someone working for the house, whether a casino, auction house, etc. The shill's function is to increase the action ( = $$) at that place. In an auction, a shill would drive up bids by actively bidding. However, should the shill 'win' a lot, of course they would not pay for it.

This is strictly unethical, probably illegal (fraud?) but certainly occurs occasionally. There's no easy way to know a shill as many auctions have the same people turning up regularly. Best thing to do with auctions is:

  • Preview auction material closely so that you know what you're bidding on.
  • Decide in advance the most you'll pay, taking into account any bidder's premium (typically 10-15% on top of the bid) and
  • Stick to your game plan on bidding.

That way you'll purchase things at a price you are comfortable with. Better to lose some thanpay way too much.

Most popular coin titles

DefinitionSearchesPercentage
Specimen Proof (SP-70 or PF-70) 54704  13.81%
Silver Clad 31731  8.01%
Coin Silver 23813  6.01%
Slabbed Coins 22686  5.73%
BN 22245  5.62%
Encapsulated Coin 21392  5.40%
RB 20621  5.21%
Deep Cameo (DC or DCAM) 17832  4.50%
PF (PF60, PF70) 17473  4.41%
Reeded Edge 16559  4.18%
Ultra Cameo (UCAM) 16509  4.17%
PQ 15355  3.88%
Rarity 15285  3.86%
PR (PR60, PR70) 15190  3.84%
MS (MS60-MS70) 15125  3.82%
Incuse 14363  3.63%
Coin drop 14093  3.56%
High Relief 14035  3.54%
Reverse Cameo 13632  3.44%
Obverse or Face side 13347  3.37%