Help Identifying a 392 HEMI for sale

Looking at a 392 HEMI ad for sale on local FB. Sent a couple of questions over about it but haven't heard back from the seller yet.

2 numbers show on the block:
1873729 (Think this is a block number, hard to tell from the photo)
3NE571606

1 number on the heads:
1731528-1

It's all in pieces, includes the block, crank, heads and 2 4 bbl carter carbs with the linkages. No pistons, rings, or caps. Selling for 2000. I think this is a crazy price if it's a legit 392. When looking at a couple of sites to ID them, I saw 3NE55 and 3NE56, and NE57, not 3NE57 so I'm not sure.

The hothemiheads.com site has a ton of info. You can even call and speak directly to Bob Walker. Super nice guy and very knowledgeable. 2K for that engine is probably right on target. If it was a good running engine, you're talkin about more than twice and possible three times more.