What Does "Reasonable Offer" mean?

What is more reasonable than market value? In fact, isn’t it the definition of a price based on factual empirical data?

Question was- what do people think a reasonable offer is.

If you want to stick to the facts then this is the definition. If you want to gauge at what point someone gets their feelers hurt then there are as many answers as there are readers here and never mind the seller may be offending the buyers by asking waaaay to much.
The question is what is meant by seller when stating Reasonable offer and how low does the offer have to get under asking for the seller to find it unreasonable/insulting?

Obviously it's about what the seller thinks, most here are arguing from the buyers perspective, what they should be able to offer, fair market price, etc..

Obviously the seller don't care about that when saying "reasonable offer" to me it quite obviously means if your price ain't near asking don't bother me with your low ball offers cause it's a NO, telling you now, F off with your bullshit, that's how I read it anyways.