If you're looking to get a personal locator beacon (an actual beacon, not a SPOT, etc), ACR has a $50 rebate throgh August 15th.
The best price I have found so far is on the GPS Store for the ResQLink, which is the smallest and lightest version, for $250.
So, it would be $200 after the rebate.
I rented one last fall and it ended up costing me $60 for the rental, shipping, etc, so buying one would pay for itself in about 3 trips.
The batteries should be replaced every 5 years, which is about $150, but they also inspect and test the unit. It doesn't have to be done, but it's relatively cheap insurance that the PLB will work if and when you need it.