I just bought my first ever Washer and dryer set. $175 used on OfferUp. Dryer works great but I needed to spend $25 on a new cable to connect to my older outlet. Washer works... but bangs due to imbalance, turns out it needs new suspension rods which after shipping, and 2 other small items recommended at the same time, was about $75. All in all $275 plus some time to repair them is a pretty good deal for a washing machine and dryer set! Going used is always going to save you money if you can spend the time to get / keep them working. Also saves things from landfills which is a big plus in my book.
If money is no object though, and you don't want to get your hands dirty, Speed Queen is what I've read as being the best quality money can buy. That and Maytag Commercial. 🍻