I'd be very skeptical about such claims unless I'd been to the house several times in the time since those primers were purchased. The how and why of their collection would need to be scrutinized as well. I've purchased some WW large pistol primers from a peddler at a gun show that were probably 60% duds. During the last primer panic I picked up a 1K of WW large Rifle primers for a mate that was damaged and there were at least 100 gone but I still paid the full primer panic inflated price under duress assured that the guy behind me would gladly pay the full asking price, no haggling.I have a chance to buy about 60K primers of all sizes, all Win. CCI and Federal but in boxes dated when bought 1994-1998. Stored in a dry AC room. They're 2,000 miles away, too. How can a fair price be determined in times of primer famine?
Right now (Sept. 2020) it doesn't matter where you look. Everyone is out of just about everything. I can't even find 710fps sub-sonic, CCI long rifle rounds, and most of the common powders seem to be out of stock everywhere. When Alliant Unique is out of stock, you know things are bad.I just left the field and stream store at exit 180 to Erie PA. nice place but very little loading supply and only four marlins there all new 1895 4570 and very short on ammo .