For Sale: Zoe brand, Double Stroller, $80
We bought this 5 years ago, so it's not the newest model, but the Zoe double stroller is light-weight, easy to fold, and fits through all doorways. It was the best thing we got when we had two small kids. Photos attached.
Here is a link to the newest model if you want details and reviews about the stroller in general. Of note, the older model we have does not have the UPF 50+ liner nor the adjustable foot rest.