This item has only been taken out once. There is very little wear around the encoders, and I think it's in beautiful condition. Input/output has been checked. I was unable to check the LAN port because I don't have the equipment. The firmware is the latest version. I am also selling a Decksaver. If you purchase it together with this item, I will offer a discount. I don't think this is a very well-known mixer, but the sound quality is good and it's easy to use. It has two USB ports, which is convenient for switching DJs. In addition to the seeep fx encoders, there is a filter knob for each channel. This is really easy to use. However, if you get too used to this feature, you may find it inconvenient when using Pioneer mixers at gigs. I think it has a design that is easy to get used to, even for those who are used to Pioneer. I am also selling this item on other sites, so please let me know before purchasing. Thank you.