Buying a phone at the store in 1983
I just started watching this show; I'm on episode 2 and already there's stuff that indicates that the creators either weren't alive in '83 or, if they were, they were oblivious to the world around them:
Some of the bicycles are a lot newer than 1983, i.e., mid 1990s or newer.
I never saw a kid with a headlight on a bike in the '80s, aside from one kid who had a small one with a generator that had a little wheel that rubbed against the front tire which only [barely] worked when the tires were rotating. It was a cheap and clunky novelty item and he didn't have it on his bike for long. The problem with big, bright, incandescent headlights like on this show is that they draw a lot of juice and typical working-class parents don't like buying batteries all the time for their kids, especially not the big expensive batteries that those headlights would be consuming all the time. Plus, most kids only rode their bikes during the day, and even if riding at night, a headlight isn't necessary for riding on the street, no more than it's necessary to use a flashlight for walking on the street at night. In 1989 I rode my bike to the next town over, 10 miles away, after midnight, on a rural road. I didn't have, nor did I need, a headlight.
In 1983 in Indiana, and the vast majority of the rest of the US (i.e., Bell System territory), if your phone broke (which was highly unlikely, because those Western Electric phones were built like a tank), you called the phone company and they fixed or replaced it for free. That's because they owned your phone; you only leased it. Had the show creators bothered to look at their Western Electric 554 phone prop they would have seen that it said on it "Bell System Property Not For Sale".
That changed in 1984 when the breakup of the Bell System went into effect. One of the stipulations of the breakup was that the prohibition against third-party phones be lifted. Most people continued to lease their phone from the phone company for a while after that, because it's what they'd always done. My parents gave our leased Western Electric phones back to the phone company and bought phones at Kmart in 1986. My aunt continued to lease her phone until the mid 1990s.