Heathkit IM-4120 250 Mhz frequency counter Factory assembly manual Original receipt January 1978 for $349.95 It doesn't work properly, it lights up but doesn't show frequency of RF signals, it count's randomly on some settings, others just zeros. No other diagnostic testing has been done. See pictures I figured some Heathkit collector might want this especially since it has the original receipt + manual. $50.00 well packaged and ready to ship. Buyer pays actual shipping Paypal preferred, contact me VIA QRZ private messaging for my paypal email address.