This is a pretty high end modular stroller from Cybex that can easily transport two kids. It is super sturdy and handles all kinds of terrain with ease.
We got this when our 2nd child was coming - but really didn’t use it that much because our oldest decided he didn’t want to ride in it with his brother. So its in really good shape.
One of the great things about it was the ease of putting a car seat in it - even though it doesn’t come with the stroller and you have to buy it separately.
Here’s the copy from the Cybex website, and a link to their entry for it. We picked it because it got great reviews all around
It costs about $1,000 new, but I’ll sell it gently used for $500
From Cybex site:
The Gazelle S modular stroller delivers an exceptional ride as a single stroller and adapts easily as a double stroller with more than 20 configurations.
Whether you’re already thinking ahead to your second child or expecting the arrival of twins, you can be sure the Gazelle S modular stroller has the ideal set-up for your future family. Choose from over 20 configurations of Gazelle cots, infant car seats, or stroller seats to create the perfect fit.
Transport one or two children with ease. The Gazelle S features a compact fold with either one or two seats attached, allowing for easy storage at home or in the trunk of your car. Whatever your plans for the day, you can rely on a huge lower basket and a detachable shopper basket to carry up to 55 lbs. of shopping bags, groceries, or your child’s essentials. And a one-pull harness lets you secure your child in seconds – especially handy if you’re strapping in two kids!
With practically endless set-up possibilities, the Gazelle S is the family stroller that always has a solution.
Link to the Cybex site: https://www.cybex-online.com/en/us/p/st-go-gazelle-s-2.html