I bought these Neko Ears last year at Dragon*Con. I've worn them a few times, but have since been sitting on my nightstand.
They're easy to put on, and can make a costume. :3
I bought these for $30 a piece, and I don't know if you can find them in stores.
I'm selling these for $25 a pair. :3
+ $4.90 charge via USPS
Credit card (through Paypal)
Well concealed cash