I've said it b4 and I will say it again:
USE CRAIGSLIST.
I was lucky enough (last november) to find someone selling 2 HP EPC's - these are thin client machines - for $100!!! THAT'S TWO PCS' FOR $100!!!
The specs were: p3 866mhz, 128mb ram, 10gb disk, usb ports and a 24x cd drive!!!!! small enough to put under your driver/passenger seat! if i had kept them (sold both already), all i would have to do is just get a $200 touch screen and i'd be set with a carputer setup!
And even better than that, the tablet which I am currently using in my car, on the market, (with docking station) goes for over $2400.
I paid $600!!!!!!!!!!!!!! I paid that much for the tablet AND the docking station!!!!!! look at the specs in my sig. and drool on your keyboards..
the moral of the story is: never be in a rush. wait for a deal and it'll come to you. the other moral is that craigslist is the ****.
- sh00k