**Double stroller that includes the following:**
2 cup holder attachments (one is already clipped on the side of the stroller), 2 bars and 2 snack trays, caddy organizer, car seat adapter (we had Britax seat adapter car seats), riding board (box is open but it has never been taken out/put together), 2 sun shade covers, each seat has a removable seat liner (easy to take it out and wash it) and an infant insert.
This is a **Mockingbird Single-to-Double stroller** (likely a 2.0 or similar model, possibly approaching the newer 3.0 version), which normally retails new around **$549** for the base frame + one seat (expandable to double with a separate second seat kit ~$175). Many of the extras here (like the second seat implied for double use, riding board ~$100–150 retail, car seat adapter ~$50, snack trays/cup holders/caddy ~$20–50 each, sun shades, liners, infant insert) add up significantly—easily $300+ in accessories if bought separately.
At $400 for the full setup with all those add-ons (and in gently used condition based on the description), it looks like a solid deal compared to buying new, especially if everything is in good shape and matches what you need (e.g., Britax car