What is a 1931 Ford Model A worth in perfect condition?

What is a 1931 Ford Model A worth in perfect condition? - 1

2 dollars

Around 20K. By perfect, do you mean the paint, interior, tires etc are in top shape, everything is there, and it runs well?

Whatever someone will pay for it. It's worth a lot more when someone is looking to buy one due to the rarity. If you're looking to sell one, unless you get lucky, it's not worth a fortune because very few people want one badly enough to pay a lot of money for one.

Replacement cost is far more than market value.

Varies according to time of sale. Condtion. Country and even what market place its put in. Though anything between 15-25k may be expected. If it was for example to have full history or a link to somebody well known etc that can add quite a percentage as interest factor.