Ability to mark price lists as Inactive

At the moment we have around 250 price lists set up. Each year we set up a new price list for specific customers so that we have history of their prices. This means that each year we increase our number of price lists by around 50. It would be great to mark those price lists as inactive that are not being used so they do not appear in the manage price lists screens and setting price list screens so they are more manageable