I remember when I got my first job, at age 14, in 1998. I cut, baled, loaded, hauled, and stacked hay in a barn for a local farmer. It was extremely hot and tiring work for an overweight geek, but it paid better than anything else I could have gotten at that age - I was paid by the bale and I want to say it worked out to about $6 / hour. I saved all summer with nothing in mind other than "I want to buy a cool tech gadget!"
At the end of that summer I convinced my grandfather to drive me ~90 miles to the nearest Best Buy, and walking in that day was the best feeling in the world - a whole store full of cool toys that I didn't have! I walked out that day with one of the first MP3 players, a Diamond Rio PMP300, and a 32MB SmartMedia card. I spent about $350 on them, which my family thought was absurd.
I proceeded to go home and fill it with songs I downloaded from UseNet, and took it to school. I went to a rural school, and I don't think anyone had a clue what it was - several people asked me if it was a MiniDisc player. I explained to them what an "MP3" was.
I wish I could recapture the feeling of walking into Best Buy in the 90s. These days I have pretty much every tech item I want, and there are very few things there that can hold my interest. It makes me a little bit sad to walk through the doors and not be excited about what I'll find. It's pretty much the very definition of a First World Problem, but it is what it is.
Back then, I wasn't really wanting "toys" as much as I was thirsting for knowledge and fields to explore. That little MP3 player introduced me to UseNet, then Napster, and finally Gnutella. It ended up being a pretty big part of what got me interested in technology in general and development in particular - I went from "Hey, this is cool, free music!" to "Hmm... LimeWire is open source, I wonder if I can figure out how to fix this bug..." over the few years following.
Ultimately, it led me to my career. I wouldn't quite go so far as to credit Best Buy with that, but it's fair to say that the store contributed a great deal to building my interest in a technology.