You can get a free Mizutani Shion “Coyote” if, during the quest With a Little Help From My Friends, you inform Saul about Panam’s plans, rather than helping her and the crew out.
This will lock you out of Panam’s remaining quests however.
There is also a Colby CX 410 Butte just sitting, waiting to be claimed, at an old abandoned film set in the Badlands, not far from the Rocky Ridge fast travel point.
Finally, players who started with the Nomad life path will be able to reclaim their Thorton Galena from the badlands junkyards. You’ll receive a message in game starting a quest to go pick it up, and either pay 100 Eddie’s, or simply threaten violence, to reclaim your ride.