All my payments were made through PayPal, and their window for transaction disputes was up before I was scheduled to receive the product anyway (based on an agreed-upon completion date). My credit card company would not be of assistance after a year, and I didn't know they were an option.
I could pursue small claims court, but the costs of my money and time to get to California (where the seller last lived, though I haven't been able to find a recent location) plus the possibility that I may not even collect, lead me to believe it's probably not worth doing.