I tried to get the 507 but it's no longer available. They messed up the arrow key layout on the 512 - https://www.amazon.com/dp/B075GZVD4T https://www.amazon.c

I tried to get the 507 but it's no longer available. They messed up the arrow key layout on the 512 - https://www.amazon.com/dp/B075GZVD4T https://www.amazon.com/dp/B075GZVD4T I just want to buy an MS Natural 4000 but they stopped making them and now you can only find them for outrageous prices! Good thing I still have one at home and one at the office.