BT, the short answer is "Shoot it".
The long answer. You've been wanting a shooter for three years (according to your testimony). You have lost faith in American and have sought a German all of this time! I disagree with you about what to do with them to get them to shoot but that's a different paragraph (same Thread). How much do you thing a collector would be willing to pay for a German made Walther (with the Interarms logo?) ? I would say....Ummm...about $500.00. But there aren't many .380 hunters in this bigger is better climate. For better or worse, the market for .380s is down. Furthermore, collectors want the one without the Interarms logo (when they want a PPK/S). Never-the-les, just say you could make $100.00. Is it worth three years of looking for $100.00?
So. You must have thought it was worth $500.00 to you if you bought it to shoot. And IMO, you aren't apt to make anything (much?) selling it.....so shoot it.
Now....If it's a SS, get rid of it. Never trust your life to a SS Walther .380. If it's blued and you want to carry a .380 caliber, (which is not currently in vogue) then take it to a competent smith and have the ramp polished at least. Plus whatever, else he thinks it needs but that will usually do it. Put 150 rnds through it without a single FTF before you trust it.
If your sure that it hasn't EVER been fired you should be giving me advice..........You know more about 'em than I do.
PigPen