i'd take the wife and Day9 key off your hands
or just the Day9 key if you want lol
Got a price in mind??
I was going to post something ridiculously high because I really don't want to let it go, what do you think it is worth?
how old is your wife?
Old enough 
20-29
honestly it depends what you value Day9's autograph as being worth
If you're in the LA area, you have a better shot at getting his autograph.
Even better if you live near Santa Monica with his close ties with Red Bull and going to events at Redbull Santa Monica Offices.
The actual keycap itself is only worth $7 bucks right now.
Can you meet him again and get another one? You'd have a better shot than me.
I tried to get his autograph/picture at Redbull NY, but he was just way too busy
That being said, it is Day9 and its not like esports autograph paraphernalia is readily available or flying off the shelves.
Its unique and frankly if you're not comfortable with selling it or putting a price, i wouldn't get rid of it.
I'd say this, i don't think you'd be happy to sell it for X amount of $$, maybe you'll rather a trade of some sort?
I can offer you one of the redbull battleground posters I was giving away. I have one that's signed by sOs & Hyun, and another one signed by Bomber.
Side note: I did get a pic with TB at Redbull BG