Seeker
In the far future when space travel is comm0nplace, antiquities dealers Alex and Chase find/sell artifacts, come across a cup from Seeker, a huge spaceship that left Earth 9,000 yrs earlier.  They find the ship after a lot of work, but it raises more questions, and someone keeps trying to kill Alex and Chase .
Space ships, Fiction, Alex Benedict (Fictitious character), Antique dealers, award:nebula_award=novel