Is there a reason why farmers wouldn't sell their fruit? (details)

I was at the farmers market today, and there was a lady who wouldn’t sell her blackberries to us. I was with my family and we are hispanic but we didn’t think that rascism was the issue.

So, as I went up to buy blackberries, the lady asked me where I had bought my blueberries in the market. I had told her from a lady a down the strip. She said she wouldnt sell me the blackberries because I had bought blueberries from somewhere else. So I thought. Then she shoo’d us off.

I have been thinking about this since I got home. Is there a reason why I couldnt’t get those blackberries? Because I had tried a small sample and it was delicious. It was kind of bizzare.