Sell at one flea market...buy at another

If you live in a region with a large city or two you are bound to have a choice of flea markets....not so much if you are more rurally located.

In my area there are 4 flea markets within 10 miles and if you go out another 50 miles you will find another 10.

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I sell at what is considered to be the "best" of the four in my area for cleanliness, vendor count, buyer count, etc.
I also buy there (picking) on Saturdays before I am set up and on Sunday when I don't sell. Those buys are from what we call "daily" sellers (less experienced) and not so much from regular or reseved sellers.

On the other hand I go to the other 3 flea markets to buy from both regular and reserved sellers as those fleas are in less desirable parts of town and many more of the sellers don't know what they've got. Picking can be good. It's sporadic of course, but when you hit, you hit big. I'm talking items you buy for $5 to $50 and sell for 3 to 10 times what you paid for the item.

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What has been your experience with buying at one place but selling at another ?  Or do you have the opportunity to do that at all?

Im planning on picking my flea on saturdays this year ( I only sell sundays )