We have a Croozer for 2 bike trailer which we no longer need and we would like to sell.
It is an older model but is in pretty much the same condition that I got it second hand from this forum. They are well made and versatile piece of kit. We have used it with our girls as a bike trailer, towing smoothly and easily. It connects at the rear hub of the bike so doesn't affect your balance. It was great to get us all out and about, and we used it for getting them to/from nursery once or twice a week for a few years.
It easily converts to a running buggy, which joined me on a few parkruns, has a small wheel to convert it into a stroller, which is useful if you want to pop into a supermarket or are cycling somewhere and then plan to walk around. It also collapses down for easy storage.
Internally there are safety harnesses for the kids and at the rear there is a massive storage area to fit all the necessary bits and bobs for a family outing, or a few bags of shopping.
We were thinking about £50, message me if interested.