Well it is sad and good news, it is from the looks of it authentic and rare, the sad is someone took about $500+ worth of value off it sanding the stock... this is typical enough, but a shame all the same. These are rarely found problem free, being that they were made when they were, early in the war when rifles were in short supply compared to need, they got used and many are train wrecks. I am not sure if any exist perfectly original-matching.
Do you have a picture of the right receiver? I am curious what acceptance is there, MO at the period used a couple different acceptance stamps (inspectors), C/X and C/B, perhaps others, but early MO production is rare. I am not altogether sure if you are better off with a straight up MO/02 or one of these recycles, they are both extremely uncommon to find and usually they are problem rifles when they are found.
BTW, still a nice rifle you have and well worth saving if you have the interest. In the US it would be a small matter selling it for decent money (had the stock been untouched, filth and all, it would have drawn some good interest... stocks are the most valuable part of a Gewehr98), but in Australia, I wouldn't know.