Considering what it takes to make good working semaphore signals the end results are not cheap. On my last layout I used a mixture of signals, some scratchbuilt, some adapted from Ratio kits. The Ratio kits need certain working parts such as levers, and cranks replaced, plastic for brass, they were powered by Viessmann motors adapted by a small system to help slow the motor action system down. Fiddly, and time consuming, on my new layout I have gone over to the Peco servo powered 'Smartswitch', excellent system, I have a superb array of LNWR L/Q signals, once the layout is eventually up, and running I will take some pics.