You can craft 424 with no crests.
The 4x wyrm crest item is 437
Then 4x aspect crest item is 447
He has a few season 1/low items that even a 424 would be a great upgrade.
I’ve made some 424 items on my new DK alt for cheap and they help fill slots like a ring and boot with shadow flame embellishment. Can always recraft later with wyrm/aspect items.