1939 I believe was the oldest. It has been updated and gutted to be more modern but the exterior, bricks and all, was the same. It was a very good looking house.
I've not sold anything considered old but I have an old who has.
He moved to the UK about 10 years ago but we still keep in touch. He bought a really nice cottage house and just last year, sold it. I'll have to confirm as I don't remember exactly but I think it was built in the 17th century. Now that's old!
I do love the older houses though, nothing but bricks and talented workmanship.
My oldest was last year. It was a well maintained farm house from the early 1900's. I believe the year it was built was 1909. It had been renovated a few times but the bones are still there and it was something to see. The family who bought it ended up offering more than the homeowners were asking to ensure they got the property.
I love old homes and have always wanted to buy one myself but there arent many in this area. A lot of them got torn down or people still live in them.
I only sold one home and it was a 1967 Colonial. It was very well maintained by the owners and only ever had one family living in it.