GPS

I recently purchased a Garmin iQue M4 GPS and set it up with Hema maps. My friend is quite impressed with the unit and would like to purchase one also, but is finding it difficult to get hold of one.

I bought mine for $400 and wouldn't go bush without it.
Has anyone any suggestions on where to purchase one of these units at a reasonable price?, I know Johnny Appleseed has them but they want over $800 each.

Any suggestions would be greatly appreciated