I have two old TEK scopes and love them both, a 475 and a 2225. That said, they are complicated machines and 30+ years old. $100 for a working 2245 is an excellent price, but many of these old scopes are a problem waiting to happen. Parts can be hard to find and even something as simple as a 50 cent capacitor can be a challenge for someone new. You can get a legitimate 2 channel digital scope, brand new with a warranty, for $250 on Amazon and I am sure on other places. Siglent, Rigol, Owan ect. They are not cutting edge technology, but are certainly fine for a beginner. An old analog scope can make a great second scope, but I would recommend you stick to something new, wait until you can afford it if you have to. My 2 cents