Items are being sold in the open market by it's vendors.
Items worden verkocht in de open markt door zijn leveranciers.
The vendors are manning their booths.
De verkopers bemannen hun standjes.
The fact that items are sold by vendors at the market doesn't imply the vendors are manning their booths.
Het feit dat items worden verkocht door verkopers op de markt betekent niet dat de verkopers bemannen hun cabines.