Not sure if I have come across your brother's story -- can you give more details?
Sure. This is how I remember the story being told, but I can also ask him for more details if you'd like. (Also, I misspoke in my post above, it was ten years the shop had not been there, though the time slip may have been 15 years into the past)
This happened while my brother was visiting home from college, so it would have been sometime between 1973 and 1977. Brother had been working with our dad outside of Seguin, Texas, and after they were done for the day, Dad decided to stop at his usual barbershop in town for a haircut.
My brother was eager to avoid having a haircut himself, so he told dad that he was going for a walk instead. Brother walked for a block or two, looking in shop windows, when he came across a sort of general store. Now, my brother is a serious comic book nerd, so I don't know if he spotted the rack of comic books through the window and that's what drew him in, or he just happened to walk in and find them. At any rate, that's the thing he really noticed in the shop, the comic books on the rack.
Because he was such a comic book nerd, he quickly realized that all the comics were all at least 15 years old. They didn't
look old, there was no sign that the paper had aged, but they were all long out of date. Thinking he'd stumbled upon a treasure trove, he was excited, but as it happened, he didn't have any money with him at that moment. He resolved to return on payday, in two or three days time.
Payday came, and my brother went back to the shop - except there was no shop. Instead, it was a restaurant. Thinking he'd been confused, he retraced his steps and walked around every block in the neighborhood, but there was no sign of the place. He says he kept up the search for a good long while, because it was so strange - a shop doesn't just disappear. The only place it could have been was where the restaurant was now located, though, and finally he went inside and asked one of the employees how long the restaurant had been there. The employee told him it had been about 10 years.
I've asked my brother if he noticed anything else peculiar about the shop, and he said no, everything else seemed ordinary. He also said there was a clerk working inside, but there was nothing odd about their interactions, either.