And as a tourist, you’d always get change back in the wrong currency (worth 1/25 the original). And to make matters worse, the change will also be wrong in their favour. Hated being assumed that I’m a dumb foreigner.
I believe they assumed you were not dumb, but that you were willing. That's what I told myself, at least.
And since the prices were about about half of what I would pay at home, I was totally OK with that.
Some markets are only open to foreign currency, and if that currency is worth 25x more to someone else than it is to me, and they're selling a product to me at what feels like a 50% discount, then I am a willing participant in that economy!
It's not something to take personally. Having those 2 economical systems running in parallel creates a big split, some things being available only in tourist shops. People have to find ways to access some goods, some will take a scammy route.
At some point though I found it quite good to get outside of the touristic areas to get a break from people wanting to sell you something, but other than that i didn't find it that annoying.
