They list at $70, I believe. Nope. Mistaken. On the Sig website it's $48.50 straight up. Which means that you'll have to look long and hard to find one for $50 without shipping. My local hobby shop has one. Amazing. There's been a list price sticker of $70 on it. But they discount. Twisters are definitely a classic. Competitive if straight, aligned, with reliable power in the nose. At least in Intermediate. Mike Palko flew his way into Advanced with one. Fox 35. Great for kit bashing. The Brodak profiles fly better, all things being equal. But they are more complicated to build. Planked leading edges. Fatter airfoils, wider flaps, truer stunt moments. My last Twister was half Fancherized. A doggy flier. O.K. Not great. Flew it in Nostalgia for years. Then Dan Banjok put it through an afternoon trimming session. Plane came alive.