I love the offbeat and non-sports cards. One of the cards I was focusing on was the Howard Hughes card from the 1936 Heinz Aviators set. Hughes' card in that set is a great rarity, and doesn't come up for auction too often. That being said, I am shocked by the price explosion of the card compared to previous auctions. In 2014, a PSA 5 of the Hughes cards sold for $657 with Legendary. In 2012, a PSA 4 sold for $478 with Legendary.
The Hughes card currently at REA is a PSA "5" and sits at $1,680 with the BP.
Yikes, non-sports cards don't often double or triple like that in a couple years, especially in mid-grade.