They may be on the way up by now. I got my commercial for five bills and I've seen them going for that still, on occasion. But it's through the auction sites where you don't always know who you're dealing with.
And I'm cheap enough to keep on looking and looking...
Here's something.
1918 Erfurt
Here's a nice one for $700
DWM .30
DWM refinish
You get the idea. Just keep your eyes peeled and you'll find one. That's the easy part. Trying to kep yourself from buying more and more expensive guns is the hard part.