Radio Shack is getting out of the Schlage Link business. Everything is on clearance and the prices really are incredible. I hit the local Radio Shacks today and most of them were sold out of the good stuff. You can still order a few things online, and check your local stores. The door locks are usually $300 but are going for $99 in the store if you are able to find them. I was able to find one keyless entry system and one deadbolt in a local store. It was $180 for the pair.
A little about the system. I have been using it for a little over a year now and I think it is well worth the monthly charge that most people cry about. The price is down to $8 a month I think and with the advances that Schlage is making it is worth the price.
EDIT: These will also work with the Harmony 890 remote. AND if you are really set against the monthly charge you can go with the bridge below. It will work with all the modules just like Schlage. Just a different interface and no monthly charge.