I remembered one from when we were house hunting 9 years ago. We'd driven over to check out an open-for-inspection and realised that we'd gotten the time wrong and it was just about to close. We were driving off when I looked in the rear-vision mirror and saw the agent chasing us up the road, waving his leaflets at us!
So in we went, the agent happily extolling the virtues of this lovely three bedroom brick veneer with gorgeous large backyard (well, it was large, and I imagine it would have been gorgeous once you'd gone at it with a weed whacker) etc etc. I wandered through- bedroom, bedroom, lounge, kitchen, bathroom...hm. Through again, same result. I checked outside to see if there was an extension I'd somehow missed. Nup.
"Excuse me," I said, "But where's the third bedroom?"
The agent's jaw dropped and he strode through the house, head turning from side to side. He came back to us.
"Oh," he said. "I must have miscounted!"
So we didn't buy from him. I refuse to buy houses from people who can't count to three.