Amazon Warehouse is currently offering a deal of 20% off a limited selection of computer accessories, including Wi-Fi extenders, mice, monitors, and more. The Warehouse already deals in used and open-box products with heavily reduced prices. The 20% off applies at checkout and just adds to the already low prices on everything you see. Because Amazon maintains the warehouse, everything in there is fulfilled by Amazon and covered by their customer service.
If you’re going to buy an item from this list, I’d recommend either something low risk like the Apple USB-C Multiport Adapter or something with big savings like this Razer Mamba gaming mouse. The Razer Mamba is $77 in the Warehouse, and with the 20% off discount the final price comes down to just under $62. Compare that with a brand new Razer Mamba, currently selling for $148 on Amazon.
There are plenty of other things to choose from in the larger list, but remember the selection is limited to what’s on these few pages and there’s only a limited quantity.