All friction mechanisms have been tested and confirmed to be working. The mini is rare, I think! Used at the Sunny Side Hotel. The Hummer is a police vehicle with opening doors. Please add them to your collection and enjoy playing with them! The blue truck is made by WELLY! Isn't it cool? It has fine details and is sturdy. I have displayed them without using them! They may look chipped or dirty in the photos, but that's due to reflections, etc. I don't see any noticeable scratches, so if you're concerned, I can upload more photos, so please feel free to ask! There are some minor scratches, so please be aware of that. I will offer a discount for multiple purchases, so please feel free to ask! If you're interested, please make a bold offer. I would appreciate it if you could consider the commission, the average shipping cost, and your request! I'm looking forward to hearing from you!