Bought my N800 for $200 used June, 08, in great condition.
Since then I have added
BT Keyboard $30 Ebay
BT GPS $32 Ebay
Car Charger, GPS $4 Amazon
2GB SD card $9 CompUSA
16GB SD card $35 CompUSA
Carry Case $10 Staples
Car Charger $4 Amazon

Total $124

Pleasure from the N800 ... Priceless