It's really not that easy. There's a lot of considerations to make. Which rack size, model you want. Finding someone who will ship that brick to you. Not trivial
Well it is, to get started. If your needs are "mild to moderate", you can buy a brand new intel NUC or a mac mini for <$500 if space is a priority, or go on ebay and buy a beater laptop (I found 5 advertised for <$100 within a minute of searching).
