This card went for $2277 in a Greg Morris auction just now (PSA 5 with an old label). This was a $600 card 3 years ago. It's been up to about $1500 but this is price is amazing.
Is there some renewed interest in Hank Greenberg? His Diamond Stars card also seems to have risen recently.
https://www.ebay.com/itm/1934-Goudey...p2047675.l2557