Wayfair via eBay offers the Maximum Fitness Gear Maximum Muscle Doorway Chin Up Bar Set
, model no. MFG4569PK, for $37.99
with free shipping
. That's the lowest total price we could find by $6. This bar fits doorways from 24" to 36" wide, and can be attached or removed without tools or fasteners. It also features three grip positions and a band clip system that's adjustable up to 60 lbs.