Excellent condition double stroller. Single stroller retails for $600 with additional seat costing $200.

Seats configure 20 different ways.

From BuyBuy Baby’s website:

Details
The all-terrain City Select LUX Stroller by Baby Jogger boasts a premium single-to-double convertible design that's perfect for growing, active families. Now folds 30% smaller and comes with all-wheel suspension plus a decelerating hand brake.
Baby Jogger's City Select LUX Stroller features an all-terrain, single-to-double convertible stroller design that allows up to 20 seating configurations (25% more than previous model) for up to two children
Accepts a bench seat so an older child can hop a ride, an infant car seat, pram, or second seat with the use of adaptors to accommodate an infant and toddler, or two toddlers (bench seat, infant car seat, pram, second seat, and adaptors sold separately)
Stroller supports a child from 6 months up to 45 lb. (90 lb. weight capacity with second seat)
Stroller weight: 30.4 lb.
Stroller weight without seat: 24.2 lb.
Dimensions (unfolded): 46.1" L x 25.6" W x 40.8" H
Dimensions (folded): 31" L x 25.75" W x 12" H
Adjustable 5-point safety harness with shoulder pads and buckle cover
Reversible seat allows front- or parent-facing positions
Padded seating for riding comfort
Adjustable, multi-position seat recline
Folds simply and compactly with auto lock for easy storage and transport (30% smaller than the previous city select stroller model)
Telescoping, height-adjustable handlebar with comfort grip
Lightweight and sturdy aluminum frame
Premium fabric
All-wheel suspension provide increased comfort
Decelerating hand brake provides enhanced controlled braking
Flip-flop friendly rear parking brakes
Lightweight, never-flat 8" front and 12" rear all-terrain rubber tires
Locking front swivel wheels
Fabric is machine washable
UV 50+ protected sun canopy with a peek-a-boo window
Convenient zippered seat-back storage compartment
Large under-seat basket can be accessed from all sides