A 240D question

[pj67coll]

So I'm considering a 240D manual I've found that had over 300K miles on it. There's blow-by. Enough to wibble wobble the cap but not blow it clean off as was the case on my last one, so I'm assuming the motor has a few miles left in it yet. However there's a problem with the manual tranny, which I like. It's ok in the forward gears but pops out of reverse. You have to hold it in manually in reverse for it to work. The sloppy shifter is fixable with new fixer bushings but the reverse gear worries me. Any ideas what the issue might be and how problematic a fix it could be? It also has a very soft clutch pedal but I didn't notice any problems selecting gears despite that so I'm assuming the only tranny issue is the reverse.

- Peter.