Actually, they quit making $1,000s several years ago. I'm not even sure about $500s anymore, either. But a large wad of hundreds wouldl work nicely.

In all honesty, though, I would never hint to a dealer that I'm paying cash. Wait till you're with the finance manager and when that person asks, "And how can we help you finance this?" Casually say, "Oh, I'm paying cash." The look on their face is always priceless, as you can tell they're seeing a big pile of bills sprout wings and fly away.