2 are available. They were both used for a few months and are only being sold because they are being replaced by the ProClip holder for the Droid with power.
Info on the holders that are for sale can be found here:
ProClip Mounting System - Motorola Droid (Verizon) - Holder with Tilt Swivel
Note that this is just the device holder. You need a vehicle mount (ProClip, Panavise, etc) to complete the install in your vehicle. While the link above has details I'll reiterate that these do not have the magnet to activate the car home and they do not supply power. They are just device holders with tilt/swivel.
$25 via Paypal for each (includes shipping). I can take a check or money order as well but I won't ship until funds clear.