What's the process if I pick up my vehicle and find damage that clearly isn't shown in the original listing photos?

Document the discrepancy immediately with your own photos and timestamps, and report it to the auction or storage facility before leaving the lot if at all possible. Policies on resolution vary by platform and by how the sale terms were structured ("as-is" sales generally limit recourse), but prompt, on-site documentation is consistently the strongest position to be in if you need to dispute anything afterward.