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<p>[QUOTE=&quot;Marsyas Mike, post: 8324169, member: 85693&quot;]I buy most of my coins on eBay, and I do get bronze disease from time to time, almost never mentioned in the description.&nbsp; My hunch is seller&#039;s don&#039;t recognize it.</p><p><br /></p><p>Any green (or white) spots I see in an auction gives me pause, but a lot of the green is hard non-bronze disease areas of ancient coin gunk (not powdery).</p><p><br /></p><p>Speaking of 12 Caesars (and kin), here is a recent Agrippina, Sr. sestertius (issued by Claudius) that I got really cheap in an eBay lot.&nbsp; It is very mottled with a bunch of different patinas, crud, etc.&nbsp; The area on the obverse before the portrait&#039;s chin and under her bust seems to be the only BD I can see for sure (there may be more under the surfaces).&nbsp; I picked much of it away and have been soaking it in distilled water (other treatments I tried are too complex for me - and leave the coin looking worse than before I treated it).</p><p><br /></p><p>[ATTACH=full]1474917[/ATTACH]</p><p><br /></p><p>Thanks to this post, I just remembered to check it again and picked off some more powdering gunk, found some more on the far left (behind the pigtail).&nbsp; It&#039;s looking better, but I put it back in distilled water for another soak.&nbsp; We&#039;ll see.</p><p><br /></p><p>Not sure what it is about Claudius and BD, but here is another sestertius with the NCARP countermark.&nbsp; This was another eBay cheapie.&nbsp; I had it for a year or so before I noticed what looked like BD on the reverse.&nbsp; Oh yeah, that&#039;s what it was - it was the creeping kind that works beneath the patina.&nbsp; When I started scraping, an alarming area of patina came with it.&nbsp; But it seems stable now, and the devastation missed the countermark:</p><p><br /></p><p>Before:</p><p>[ATTACH=full]1474924[/ATTACH]</p><p><br /></p><p>After (the overall color didn&#039;t change; my photography skills are poor and the sun was probably lower in the heavens).&nbsp; I&#039;m keeping an eye on it - my guess is some BD still lurks under the surfaces, maybe everywhere:</p><p><br /></p><p>[ATTACH=full]1474925[/ATTACH]</p><p><br /></p><p>Am I unhappy about this?&nbsp; Not really - when buying low-grade stuff on eBay I expect poor or non-existent descriptions, often from inexperienced dealers, or coin guys who do not usually sell ancients.&nbsp; Now if I were buying from a Vcoins dealer or a big auction house, I&#039;d expect more due diligence from the seller.&nbsp; But with eBay, caveat emptor and (sometimes) low, low prices! <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie50" alt=":happy:" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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