If you convert it, 200,000 KM's is around 125,000 miles. So in reality, you have really just hit the maintenence point for the items you have had to replace. Most ball joints do need replacing around that point in time, as well as brakes. Depending on how it was driven, I could definatly see it needing a clutch as well.
I think that since you have now gotten all of those issues sorted, you should have a great running truck that will last for years to come.
I know what you mean about buying used vehicles though. Everything looks great until you go for the safety inspection. I just went through it here, and I think I put out around $200 to bring everything up to specs. That is doing all the work myself however. Could have easily been $1000 if someone else did the work.