I bought this rog Ally Z1 not extreme off of eBay. I thought it was the Z1 extreme. It is an older model but it was still brand new in the box. I have the receipts and such to prove. I upgraded it before I realized it was a non-extreme. I had to change the back plate and cut some plastic pieces for the JSaux battery and thermal upgrade. I also updated the storage to a terabyte SSD. I put out over $800. It's been rarely used this year because I built a PC afterwards. So this is an rog Ally Z1 non-extreme with 1 TB hard drive and a 65 w battery upgrade and thermal upgrade. It's running steam OS. It's as powerful as the steam deck unplugged and it's slightly more powerful plugged in. I have receipts for all of it. All the parts I bought the dates I bought it the dates I bought the rog Ally off of eBay etc.