No, not really. They'll increase a bit but not substantially. The reason being that there are generally more of the 'newer-limited' vanities. This is because when everyone found out that they increased in value more people tried making long term investments. When a lot of people make the same long term investments the outcome is low. So there's more enough to supply the demand for a few years. Look at boar sets. They have been out a while and they don't seem to be picking up value at all.