The boats might actually be old. The lithographing has that faded look that modern repops don't get They look like 1950's japan pop pop boats. They use candles to go. Obviously, the better the condition, the more they are worth. If you have one in great shape with box, your looking at $20-$30. The boat with the sticker on the bottom looks in good shape, and if it still works with a candle, I could see $5-$10 just for that one. The buses, they probably are newer and maybe worth........$1 a piece!!!
But yeah, you probably should have grabbed the other ones, because tin toys are doing good now.
Anyways... try to give the boats a light cleaning with a damp cloth. That will make sure no rust or crazing occurs.