And re the link I had included, somebody must have scooped on that deal. To check periodically click the link(s) below. Then where it says "Buying Choices" if there are any used ones available you will see "used" in blue. Click that and it will show what is available along with a description.......
4GM link
http://www.amazon.com/weBoost-...keywords=weboost+4gm
4GX link
http://www.amazon.com/weBoost-...keywords=weboost+4gx