the key I obtained from Ebay auction is stamped Do
Not Duplicate, which the original DEC keys do not say.
If you have evidence that the key is a
copy-of-a-DEC-key and not an original DEC-key,
and the wording clearly states or implies DEC-key
and not copy-of-a-DEC-key, then report to the
seller calmly and politely stating the nature of
the _misunderstanding_ and ask for a refund.
Either way, since none of these keys are Marked DEC,
the need to buy any one on eBay is unclear.
just my $0.02 (plus shipping)
John A.