I won't post any ebay links, but I just got notified from ebay that there are 6 Uplink AnyNET modules for $50 buy-it-now ($35 initial bid). This is half the normal price that I see them for on ebay. If you were thinking about going for cellular monitoring, this might be the push you need. You should be aware that they do NOT come with the necessary connector to hook to your Elk XSP, but neither do new units, so that's not a big deal. Hope this helps somebody out.