I have prepared some MiniPC's for sale for the specific purpose of running bulletin board systems off of. They are also useful for low-power projects that you may be interested in undertaking. I have two models: the ZOTAC ZBOX CI320 and the Dell ThinClient Dx0D. I hope that you find something that will work with your BBSing hobby or general nostalgic computing projects.
Zotac ZBOX CI320 Mini PC 1.8GHz x4, 8G RAM, 1T SSD, USB 3.0, eSATA, A++ !! w00t $300 CAD + Shipping
$225 USD apx. + Shipping
https://www.ebay.ca/itm/1866227318
https://www.ebay.com/itm/1866227318
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Dell Wyse Dx0D 5010 AMD G-T48E 1.40Ghz 4GB RAM 256GB SSD Gbit Ethernet HDMI WiF $150 CAD + Shipping
$110 USD apx. + Shipping
https://www.ebay.ca/itm/186609481049
https://www.ebay.com/itm/186609481049
Good luck and have fun!
Cheers!
-warmfuzzy
--- Mystic BBS v1.12 A49 2023/04/30 (Linux/64)
* Origin: thE qUAntUm wOrmhOlE, rAmsgAtE, Uk. bbs.erb.pw (700:100/37)