I suspect this is an older regionalism. I often heard relatives say “I trade at that hardware store.” Meaning of course they shop at that hardware store. They aren’t literally trading their shoes for a garden hose. 
Are you familiar with the terms usage? Do you use it often? Where are you from?
I use the term “trade” interchangeably with “shop”. I’m from the deep South.
I’m from the DC metro area and I’ve heard phrases like “I got to that store to trade”, but only with reference to stores where trading cards and the like are a big part of the business. I’ve never heard “trade” as a synonym for “shop”.
Webster has a close example. *did a good trade in small appliances * Meaning commerce. He’s selling small appliances. Not trading beaver pelts for them. 
Oxford is similar. It’s a synonym for commerce.
Outside of literature, I have never heard it used.
I know some people use it that way, but I’ve never heard anyone actually say it.
I have only heard the term used in this fashion, in the sense of commerce, not in a regular consumer going shopping.
My dad and his brother both say it, even for a gas station. Southwest Arkansas, born 1920s. But when they were boys, the trading did sometimes go both ways, I think. Folks sometimes sold eggs to the grocer, that sort of thing.
Yeah, it sounds old-timey to me.
That’s my grandparents region of Arkansas too. 
You make a good point that originally there was trade or barter with the stores. Back then even doctors would take farm goods in exchange for delivering babies. People didn’t always have money in the depression.
I guess my grandparents continued to say “I trade with such and such store”" even when bartering had ended. They had a local grocer they traded with for over 40 years. They had credit at his store. Every month grandad paid the grocery bill. It was matter of pride that he never missed a payment in 40 years.
I’m also from the deep South and I’ve never heard that.
ETA - I do, however, every so often hear a new regionalism that’s local that I’ve just never heard before. When I started working retail ten years ago I was surprised by “case quarter”, meaning an actual quarter instead of two dimes and a nickel.
Yep. I voted “No - never heard trade used like that before” but I mean in real life. I have read it in historical novels.
Yes, I know the term and have heard it used especially among older black people where I grew up (Northern Louisiana). Younger people don’t usually use it.
My grandparents both used the term.
My grandfather was originally from Poland, but grew up mostly in northern Indiana. My grandmother was from Pennsylvania but lived most of her life in Indiana as well. I’ve also heard it from some of the folks to whom I used to deliver meals on wheels here in the mid-south.
Never. Seems like either a very local thing (as in confined to a small town) or a couple people trying to sound unique. Probably a hold over from extremely old timers who actually used to barter for goods with success.
I mean, could you imagine trying to barter at 99 percent of retail stores today? It just wouldn’t happen.
Yay, it is is another of those threads where the OP doesn’t seem to realise that there is a world outside of the US. Or does Europe count as East coast?
You also probably should have gone with just “no” or given a “no - but I do hear it from other people” option.