That bass appears to be an early 2000's Spector 5 String ReBop.
The newer models have crown inlays.
(He is probably using the NS, because of the curved body shape)
A New ReBop goes for about $1400 to $1600 US.
A Used ReBop goes for about $500 to $800. US.
A ReBop is a mid level bolt on neck model made in the Czech Republic.
There is also a neck through model made in the Czech Republic referred to as a EuroLX or Euro (older models)
They would go for $1500 to $2000 new and $800 to $1200 used.
Then there are also Korean Imports called Professional Series. usually "Legend models" and a lower end called Performer Series.
And Ofcourse there are the USA models. Which would start with NS as the model numbers.
These are much more expensive.
Check out the Spector Website:
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P.S. I think I got it all correct, one of the others from the Spector group will provide an update or correct any of my info.. Good Luck, hope you join the Spector World.