Zeptobars writes

"Walking around ebay I noticed insanely cheap OPA627's. It's rather old,
popular and high-quality opamps, often used in audiophile gear.
Manufacturer (Texas Instruments / Burr Brown) sells them 16-80$ each
(depending on package & options) while on ebay it's cost was 2.7$, shipping
included.

Obviously, something fishy was going on. I ordered one, and for comparison
- older one in metal can package, apparently desoldered from some
equipment. Let's see if there is any difference."


http://zeptobars.ru/en/read/OPA627-AD744-real-vs-fake-china-ebay

Ref Hackaday.
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