I buy stuff from China on a regular basis via eBay. Mainly parts for my plotter/cutters - I don't understand how they sell these parts so cheaply in China. Anyway, waiting several weeks is not unusual, even for the smallest of parts.
Personally, I think you have every right to be upset and I think your comments here are justified to warn other Brethren who may be considering doing business with this individual. So, thanks for the heads up.