A buddy of mine had a really nice black Olds F-85 stick car in the '90s - a '64 or '65 base 2-door sedan.
He couldn't get a bite on it at his original price, so he raised the price by $4,000, I think.
Something like from $8K to $12K.
It sold within 2 weeks at the "improved price".

To me, this car's too rough for that kind of thing, but the psychology may apply again.