Hi there,
Im on with my first rebuild, a yamaha rd125dx, it was a complete basket case when i picked it up but very cheap (£80) with loads of spares, only problem with all this is I dont really know what is there and what isnt so its only until I got building it I could see what was missing. Must agree about the cost though, it can rise very quickly without you knowing about it, still the main thing is the fun of rebuilding it and getting to ride it when finished.