The seller has the right to ask anything he wants. A buyer can pay it, negotiate or pass it up altogether. Maybe there is more to the story.....
Suppose the seller's significant other is saying "you have too many projects and one of them needs to go!". Seller says "OK Dear, I'll put it up on Craigslist".
Hmm..... no offers? Seller says..."Dear, I guess I'll have to keep it".
Kevin