A seller has an ad for items for sale with pictures and description...a buyer agrees to purchase these items. Once the buyer get these items he wants to renegotiate the price because he doesn’t believe the description was correct. So the seller says no renegotiating - just send the items back for a full refund.

The buyer says no. You send me my refund 1st. Then I’ll send your items.

What is the correct way to close this non sense. The seller even suggested send the items back with tracking and signature and the refund can even be PayPal so it’s instantaneous.

What’s the correct way? To settle this.