Ah, so the speaker scam turned out to be a really weird thing. It ended up being on the news.

So there was actually a real speaker company that had a gimmick going on. They bought a bunch of white vans and stocked them with loads of new boxed speakers. The speakers were branded with some unknown label that sounded expensive. I can't remember what it was, but I assume they were made in China or somewhere like that.

They would hire 2 guys for each van. They would then drive the van around town and pull up next to you in a parking lot, jump out looking around like they are watching out for cops or something. They'd walk up to you all on the down low and say something like

'Hey, man - We went to pick up a load of high end $2k speakers for the boss and they put too many on the van. We are trying to sell them before we get back to the office.. We'll give them to you for ... idunno 300 bucks'

Then you'd either buy the speakers or haggle with them for a minute. Either way, you leave thinking you got $2000 speakers for like 200 bucks. In reality, they were just selling their own knock off speakers street style.