i bought mine from gpsdiscount.com
I was a little skeptical of the site at first but it was recommended to me by lots of local geocachers that I trusted. I took their word and was happy with the unit, shipping, and everything. saved over 100 bucks on the unit buying from them.
Its great to have on the bike too. I went ahead and got the topo maps for it. Its awesome having a color topo map infront of me while I'm exploring country roads, and off road.