If you missed out on the NES Classic you're in luck! ThinkGeek is bundling the system with Nintendo swag. They retail anywhere from $139.99 to $219.99.
Ninetendo isn't making this device anymore and if you try to buy one on eBay (& risk it being a knock off) you're looking to spend at least $200.
So this deal is looking pretty good, even though you'll be paying almost double than the original $60 price tag for the system.
They are on sale now on ThinkGeek's website and it's limited one per person. Kinda debating getting one for myself!