Lost in the desert

These two blokes are lost in the Sahara desert. They're desperate for water, but just as they think they're about to die, they chance upon a village where market-day is in full swing.

They go to the first stall they see and ask if they can buy some water.

"No," replies the Bedouin stall owner, "I only sell fruit. Try the next stall."

So off they go to the next stall and again they ask for water.

"Sorry," says the merchant, "But I only sell custard."

"Custard?" one of the blokes says to the other, "What kind of place is this?"

By now desperate, they go to the next stall, only to be told, "Sorry, but I only sell jelly."

Hearing this, one of the blokes turns to the other and says,

Spoiler:

"This is a trifle bazaar."