A CNC engraving machine, fully assembled, new in box, $200, about 5 years ago at MicroCenter. It kinda worked, but the work area was really small 16 x 10 cm, and the motor left a lot to be desired.
The state of the art back then sucked.... now I'm pondering something a bit better, like the Carvera Air.
Omarchy, a set of pre configured arch Linux tools from DHH and company. Tried it on my old MBP 2015, the machine felt brand new almost as snappy as my MBP M4 so I went and bought a ThinkPad the next day and started daily driving arch
The state of the art back then sucked.... now I'm pondering something a bit better, like the Carvera Air.
Before that, Turbo Pascal for $49 was amazing.