The Vector came in 3 models - Vector, Vector Comp and Vector Pro. The Vector was the base model. Not particularly light by today's standards, they were considered solid wheels and were the precursors to many future wheels in both the Rolf and Bontrager lines (long story).
$150 sounds like a fair price if they are in good shape. And from what I can see of the braking surface, they do look OK.
55/Rad