It's UDA. They're just the worst.
I have a Ripken jersey I purchased from UDA directly that doesn't appear in their database. If you call they tell you the same thing.
I'm a reseller but shy away from these threads from these reasons because I generally think it's scummy. But in my experience there are lots of different reasons people do it, most of which have been mentioned here.
In addition to reasons listed, sometimes I find that - believe it or not -...
would be interested in prices on these (but per rules you're supposed to have prices listed...)
2004 Playoff Prime Cuts Duke Snider pants /25
2012 Panini USA Trea Turner Dual Jersey auto /89
There are multiple copies of the other cards I sold back...so no use in going after them...but assuming it doesn't go for a huge amount (which it probably will) it'd be cool to get the 1980 Henderson back (if they indeed made it)
Any way you can take another photo of the card just to prove that it is yours? I am interested, just obviously wary of a large deal with a brand new member.