Since there is no one any longer offering a single update I am considering a subscription starting in Oct or Nov if I can find others whom collectively would take be interested in buying some of the updates to offset the cost. I have been paying $50-55 per update once or twice a year but now I need more like 4-6 a year and I know there must be a need some where. If you would like to be able to swap me your data card for one with a current update let me know.
The entire GX series uses the same update. I actually have a 50 and a 60