I saw this dx.com TP-link:http://www.dx.com/p/tp-link-tl-wr703n-mini-3g-2-4ghz-802-11b-g-n-150mbps-wireless-router-blue-158552?utm_source=dx&utm_medium=edm&utm_campaign=other20141027networking#.VE48WedJ6cE25 dollar...and this is the 3G version.
postage is free (or one cent
Be aware these things do not have build in 3G support. It just means their software supports USB 3G dongles.
Also, this USB port will in the case of Superglue be in use for storage (you might be able to use a USB hub to create extra inputs).
These also have very little memory and probably won;t be able to run Superglue...
For more info, go here: http://wiki.openwrt.org/toh/tp-link/tl-wr703n