are you about to embark on a long tour? if not you can slowly upgrade parts, changing things out that you notice will need to go...300 is alittle steep but if its in nearly new condition it's a good deal considering what else you can get new these days for that... also look for a late 80s novare (REI brand) they made steel framed touring bikes and they turn up on ebay every once in a while really cheap.

I'm pretty sure a the time of its creation the 520 was considered a full touring bike, but i could be wrong.