I have had more buyers complain about unpleasant "scents" from dog/cat odors........cigarette smoke odors.............and damp musty basement odors.....not to mention various cooking odors ....those can really make people feel ill and/or turn them off to a home.
So, I would suggest sellers work on those odors first..........
The whole scent and good smelling home for a seller is a double edged sword. Some buyers would love to come in and smell the cookies and baked goods while others would absolutely hate it and wonder what they are trying to cover up. With plug-ins and air fresheners you just need to be careful with the amount. Point taken but it is impossible to make everyone happy.
Your point is well taken.....on the other hand how would one address the problem of others over doing it with perfumes and colognes? Let's face it, the American public has an aversion to offensive odors but the line is too often crossed.
Most sellers do not use the plug ins as they can be a fire hazard if left plugged in. Perhaps Alan is right when they were trying to cover up a smell. Maybe the smell they were covering is what made you ill. I have had buyers get sick over pet odors, trash smells and smoke, but never plug ins.
I think that's an over-generalization. I certainly prefer natural scents (boiled vanilla or cinnamon sticks, freshly baked bread or cookies)... but sometimes artificial scents are needed to cover pet scents, or musty odours.
I've yet to hear from a buyer's agent that the use of plug-in, scented candles or fragrances has annoyed, bothered or made viewers ill. Perhaps they just "overdid" it?