https://www.ebay.com/itm/173876860285price is 139 USD only, only one;
we just do the research for the 2G/3G/4G/5G RF scanner, for the signal demoduation, we need the stable clcok source, so we also collect more Rubidium or other clock for the research, that is why my selling is so cheap. sell the clock is not our major task.