Looks to be an old lead CPLT-C1 Catapult (20-852) and a lead JR7-D Jenner (not 20-869, but the OOP one. You can tell buy the placement of the SRM-4 Rack over the torso.. 20-869 have a line of armor plate between the SRMs and the grate below it)
Both are no longer in production, so they ARE both OOP... What they aren't, is Unseen.
I'm sure the person who posted it is trying to say "No longer available" (whether due to the model or that they are made from lead)... Some people will try to take advantage of the unknowledgeable. Others are selling stuff they only have a passing knowledge of, and can make a mistake... You've got to decide for yourself which this person is...
As a comment on the Jenner... CSO has 14 of the 20-869 Jenner, and only one of the OOP one this person is selling... It may not be unseen, but I would say it might be a little rare.
Caz