Thin clients can be a good alternative to the Raspberry Pi. I have Volumio installed on a Dell Wyse 3040 thin client, available used at roughly $50 from Ebay. This particular thin client has a cheap onboard DAC for a headphone jack, 16 GB flash drive, 2 GB RAM, but unfortunately no WiFi.
Adding WiFi was about $20 extra for a USB dongle.
This is not to disparage the Raspberry Pi, or any group buys. The case for the Wyse 3040 has a rough industrial appearance, and a correspondingly low Wife Approval Factor, but it’s small enough to be tucked away somewhere out of sight.