Also, there was a guy selling VGA'd 3DS games a while back for around 500-600 bucks. Derp.
And NOTHING beats the coffin'd Gold NWC cart that is actually back on eBay again.
If you think it's gonna be worth something, then throw it in an air tight bin for ten years. Then, if it actually does become valuable, send it to the VGA. No sense in wasting 50+ bucks if it ends up being worth absolutely nothing.
It's an absolute waste of money to have a modern game slabbed.