181600271036: a hand-signed "original" photo (not a lithograph) of Rick Mastracchio's spacewalk from STS-118.
I would imagine that a signed photo would be more valuable than a lithograph, but I'm far from an expert on these matters. Any questions, please ask.
181600426127: a flown patch montage from STS-118. What's great about this montage is that it is not inscribed to anyone in particular.
I do want to add that I understand that there is skepticism with purchasing from someone new to this forum, but the reason why I have these items is that Rick (the astronaut on this mission) is related to me (if you e-mail me, I will give more details), so I have a few items that I'm looking to sell to get some extra cash for the holidays. Any items that I have are 100% authentic and given directly to me.