Yeah, I see what you mean, but I'm not one of those guys who cannot set his own ignition really.
I think I can do it even though I have no experience with gearboxes, there's a moment of learning something new for everything right? I took it apart and it doesn't really scare me, what could be so hard about this thing that I couldn't fix it? I didn't know anything about cars but I restored one anyway, did everything myself (couldn't weld, spraypaint or what else, now I can). So I believe I can get this one going well again if I just know what I have to replace.
Ofcourse I agree with you that, if a lot of parts have to be changed, it's not worth it to overhaul it and ofcourse then I won't because there's a lot of good gearboxes for sale.
I also believe in restoring things, not just replacing with something else when something is worn out because a lot of things are easily fixable. So if it's just one of those synchromeshes, then I'd rather just replace that one and not get a whole new gearbox. Besides that, I'd like to have a gearbox in my car that I know is a 100% good. I want to know that my gearbox is good and that I will not strand somewhere in the middle of France or the like.
I don't mean to be the wise guy (otherwise I guess I'd not be sitting here asking for your help) but I'd like to fix this gearbox and get it into a good condition, buying another one is always an option ofcourse. The synchromeshes are pretty cheap at Franzose.de by the way! The bearings are a little more expensive.