I mean, the act of people scalping stuff has existed before the digital age. Even a century ago: scalpers would pay a third party to hold a spot in line on purchasing concert or theater tickets to resell at a higher price since the internet didn't exist back then. Like, in the 90s: scalpers showed up in person (paying someone to hold the spot for you whilst in line) for acquisition of the product, that's how they've done it.

At the time, pre-orders for an upcoming console or game were done in store (you physically went there placing an order after seeing an ad on TV or a magazine). But, how common were scalpers during that era? It would be like a group of scalpers pretending not to know each other or split into smaller groups heading to different retailers on buying the same product whilst playing as another customer.