I've seen this model used at collectorz.com - you buy the software, and it comes with one year of updates. When that year expires, you are basically frozen at t

I've seen this model used at collectorz.com - you buy the software, and it comes with one year of updates. When that year expires, you are basically frozen at the last version of the software, or you can choose to buy an additional year of support for about half the cost of the initial purchase. Seems to be a reasonable compromise to me.