All four main characters have nicknames three of which are better known by said nicknames (Corey Harrison = Big Hoss, Austin Russell = Chumlee, Richard Harrison = Old Man.) In early episodes Rick Harrison was nicknamed The Spotter and Richard Harrison was nicknamed The Appraiser, but these never caught on.
When the show came on the air, customer traffic to the pawn shop boomed. As a result, the store was not only forced to hire tons of new employees, but also to make customers to stand in a line outside the store so as to prevent overcrowding.
Originally, they had shot a pilot for HBO. Rick stated in his autobiography that he didn't like it because they "focused on the night window, and treated customers like they were animals in a zoo." He said that this approach was very misleading about their business.
Other Pawn Shop employees besides the "big four" the show focuses on include: Antoine - the large African-American security guard, Peaches - the sexy young blonde who is punished for her habitual tardiness, Scott - a part-timer who often finds things to sell to the shop at flea markets/estate sales/etc., Fat Back - the in-shop mechanic, and Audie, a middle-aged, bearded Hispanic man. Numerous other staff persons are seen but not named.
Count's Kustoms, one of the auto repair facilities on the show, once featured a banner on the wall promoting an establishment called "Feelgood's." Feelgood's was a bar owned by Vince Neil, lead singer for classic metal band Motley Crue. The name referenced their classic song/album, Dr. Feelgood. However, Danny "The Count" Koker, the owner of Count's Kustoms, has since become the full owner of that establishment and changed the name to "Count's Vamp'd."
Rick said that Leftfield pictures made a highlight reel, and showed it to the History Channel on a Friday. It was picked up the following Tuesday, which is one of the fastest times ever for green-lighting a series.
Seasons from 2009-2013 feature the "original" intro sequence, which shows members of the Harrison family around the shop, showing off and handling a number of items the shop carries (including Confederate money.) This intro is noteworthy in that it does not at all feature Chumlee (as it is unlikely the crew knew how popular he would become at the time.) Starting mid 2013, a new intro sequence began airing, with an instrumental by Lynyrd Skynyrd serving as the theme music. It features the 4 main cast members (including Chumlee) walking down a Vegas street together, and ends with them standing on the Pawn Shop roof.
Originally, only the parking lot south of the Pawn Shop was used for customer parking. The lot north of the building (identifiable by the banner reading "pawn shop parking - other side of building") was originally used for government employee parking during the week - and people who would park there for the pawn shop would often get their cars booted or towed. However, due to demand, the Pawn Shop purchased this property, and it is now used for shop parking.
Rick Dale, the owner of Rick's Restorations, where the pawn guys regularly take things to have them fixed up, now appears in his own spin-off series, American Restoration (2010). The Pawn Stars guys occasionally appear on there as well.
The series usually avoids referencing other History Channel programming, however an early episode featured R. Lee Ermey visiting the Pawn Shop during the end credits, talking about a new show he was hosting at the time. Likewise, Larry the Cable Guy appeared promoting his new show, Only In America.