The Tek 8500b I bought on ebay, turned out be a fully functional working machine. Read the manual and tested it. WOW! Gotta get batteries for it. Next will be rechargable batteries for it. Need to find out the specs for the charger for it and can find one that works. Tomorrow me and my new machine go for a test drive. Will post pics tomorrow of finds. Have a great day... I know I will.