Free: Contests & Raffles.
I just posted another post asking for feedback on this unit. I am looking into getting one as well.I looked online for the best deals I could find. The best one I came across was through PCNation.com. They have the 530hcx for $364, the Garmin topo program for $79, and a 2GB micro sd card for $10. Whole package for $455. Thought that was a pretty sweet deal for all three items and 3-day shipping was free.
If you want to actually load maps and not just waypoints, you will have to use Garmins Mapsource on any of their units. You can use other programs such as National Geographic's TOPO to upload waypoints or transfer waypoints from your unit to the mapping software.If your looking for good maps, Garmin does have a 24k TOPO card that they are starting to release for a lot of states. They generally come as a two state package so for Washington you also get Oregon. Only downside to these cards is that if you erase the information you are out $100.