When our home was for sale in upstate NY it was on the market for 14 months, so there were lots of potential buyers that came through.
One gentleman, who was, according to the buyer's agent, well over 6' tall said he would buy the house if we agreed to pay for the widening of all of the doorways to accommodate his wide shoulders. I relayed a statement back to the buyer's agent asking what we were supposed to do about heating vents or water pipes that may be involved in the walls. We never heard back.
Another potential buyer decided that the back yard needed to be "dug out" so it was level with the home (the house was built half way up a gentle slope). When we relayed that where they wanted the yard "dug out" was a septic leach field and there would be a fairly large wall at the very back of the lot that would need some sort of retaining system they decided not to pursue a purchase. Their agent could not understand why we were being so stubborn.
"Just dig it out". Um, where would you like the septic field?
We did eventually get a buyer for the home but I recall this conversation with our agent:
I spoke with our agent on the phone one evening and she was sounding very tired. "What's up?" I asked. "Oh, I showed a property today which the potential buyers said was perfect except there's an old cemetery on the road a few lots up from the house. The buyers said they didn't want dead people in their water".
I know I could never be a real estate agent. I would be too likely to blow a cork.