Newbie...looking for some advice

[Steinar]

Hello Justin,
first of all I wish you good luck with the potential purchase and welcome to this forum!
The engineering and manufacturing behind the Lugers are quite impressive.. Will be a joy just to pick apart :-)
It's quite easy to do so, just keep in mind that use of force is never needed.

Cleaning the barrel for improved accuracy.. well, cleaning it sounds like a good idea, too keep it from corroding. But I would not expect this to improve accuracy. One of my Lugers have a pitted and almost smooth barrel, can't say it's less accurate than one with a minty bore.

Pitting and rust.. I would leave it as it is OR bring it to someone who restores Lugers/antique firearms as a living. You can get far with patience and regular gun oil. Perhaps brush it gently with copper brush on problem areas as an addition to this.
You could place it in Kroil over night before you start oiling it up, that will help to remove old grease and other goodies.

As to the value.. about 3000NOK (=528USD) here in Norway. Your 'location' does not say where you live.