I had ordered a Transistor Tester a while ago on eBay. I have been having trouble reading the markings on some of my diodes and capacitors so I was hoping to find a measurement tool for them. I was shocked to find that kits of the OSS Transistor Tester circuit run around $15 - seems like a no brainer to buy one and try it out. I finally built mine today and I love it.
This particular one can be found by searching ebay for M168 Transistor Tester. You get no instructions in the kit but you can search for Karl-Heinz Kubbeler transistor tester and get instructions there if you like. In short, you plug something in, press the reset button, get some nice info, and then the display will shut off in a couple seconds.