This sale is for the Tektronix TM503 mainframe and the DC504 Counter Counter, the FG502 Function Generator and the PS501-2 Power Supply. The Function Generator is working fine. The Power Supply is working as well (0 to 20V + 5.0 volts) but the ammeter reads low. The DC504 is not working in the counter mode. The Period Measuring and Totalizing functions are OK. This is in very good to excellent cosmetic condition.Shipping in the US will be for 20 lb by UPS, California buyers must add 7.75% sales tax. Shipping will be for via USPS Priority Mail.California residents must add 7.75% sales tax.