Last weekend at the market I told the cashier I wanted to pick up a watermelon on my way out. She asked which size I wanted and I told her a small one would be fine. I thought they were all the same price, so I told her I wanted one of the $5.99 melons. The other girl who worked there said she had two left for $4.99. Well, there was no need to try to convince me further. I didn't even care what size it was - I wanted the cheaper melon.
Strangely enough, the cheaper watermelons were bigger than the more expensive melons. I guess you could say I got lucky. Or maybe not.