I get a little uneasy however when the vendors open the machines right on the spot to show off their innards, or to change chips. One area with outstanding prices was in small peripherals. More normal cables were generally one third to one fifth of the price of those sold in discount stores. Many books were on display, at good discounts. There is a lot of software, one version older than the latest one, available at bargain prices.
People buy and register it and then upgrade to the latest version at little or no cost.
Of course all of it is still shrink-wrapped and probably not pirated. CD vendors have been proliferating in the last two years. They carry a wide assortment of educational, business and game CDs, while the X-rated garbage is finally subsiding . Newcomers to these fairs may be reluctant to buy big ticket items from transient vendors. I have found that most sellers have been coming to these shows for years, and most also have regular stores.