That TARGET cover is a classic! Congrats! I got mine in a solid FN from an early Vault auction.
It took forever, but I scored the Wit and Wisdom cover about a year ago. It's an odd little book.
I mainly have stayed away from the jungle covers because they seem to be 2x as much as some others. I much rather would have the horror and romance covers! I haven't purchased any in a while, as I've been buying a lot of statues, but I keep my eye open.
I'd love to complete a SPOOK run, and I'm close to getting all the Startling Terror Tales. I just need the #11, and the Hyde cover (#10?)