That Roadtrek looks like a nice unit. For comparison, last year I bought a used 2010 Leisure Travel Van Free Spirit on MercedesBenz Sprinter, about 65,000 km in excellent condition for about that price from a small used RV dealer. Since that Roadtrek has higher mileage and is on a Chevy chassis, the price seems high. Good luck getting your B.
2010 LTV Free Spirit
1989 VW Westfalia