Currently running High Sierra 10.13.6. The specs can be seen in the link, but the only major difference is 8GB of RAM and a 400GB hard drive (WD4000BEVT). It will come with the power cable, but no additional hardware.
https://everymac.com/systems/apple/mac_mini/specs/mac-mini-core-2-duo-2.4-mid-2010-specs.html . (Images coming soon)
Mojave is not "officially" supported, but there may be a workaround at http://dosdude1.com/mojave/ .
$220, cash only. E-mail or text if interested (303 area code, not 309).
do NOT contact me with unsolicited services or offers