I reported on my recent purchase of a mini PC for IPFire here:
https://forum.ipfire.org/viewtopic.php?f=86&t=23022#p126256
Price has since come down to about USD122, for the minimum, working configuration. It has much the same spec APU as the Geode 412LX, plus AES. It appears to be less vulnerability than the Celeron J1900, that was mentioned earlier in this thread.
A downside is the single Ethernet port, although it can be purchased with WiFi card, to provide Blue network. At the price, I can live with USB-Ethernet for the second Ethernet port. I don’t need Orange network.
Mine is branded “vpopn”. The unit is sold under many brand names. Anyone purchasing one needs to take care to get the model having A6-1450 APU. A variety of Celeron, i3 etc are offerred in the same case, but would have more vulnerabiliites, even though some might have more Ethernet ports and even be less expensive.
Reliability does remain to be determined, but I’m using it for only a home network and always have a reserve IPFire box.
Rod