Depends what he wants mate, the first gen Hinckley Triumph T300 series Triples can be picked up for peanuts. There was a tidy Sprint like mine sold on Ebay 4 miles from me for £440last week. I paid £510 for mine. Lots of bike for the money. They are modular as well, all the same cycle parts and tanks just the fairings that are different. Daytonas hold their money but Sprints and Trophies don't so there is lots of scope to play around. Also the 1200 motor is a straight bolt in for the 900 frame. So you can make a 1200 Sprint either by bolting in the motor or just changing the Bodywork. Hours of fun for you dad at little cost. The Legends (Bonnie Lookalike Triples) are a different matter they hold their money well but it is possible to turn any of the other models into a Legend with the right bolt on bits. Also you have the CRK Cafe racer kits for T300s. You are right though the money is in 125's but life is to short to be fecking around with them IMHO. I will do it for my brood but it's doesn't float my boat really.