RepRap Mendel
What is my purpose? --- You pass butter!
Here you can see an old RepRap Mendel after(!) removing it's dust cover. I got caught in the 3d printing hype just after it started. It's a pretty old model and most of the parts were sourced from ebay or shops that are long gone...
The 3mm PLA filament I used didn't have the best quality, the Z-axis was built from nuts and threaded rod so the quality of the prints was not the best.
But I had a blast tinkering around with self-made parts and improving (Ger.:"Verschlimmbesserung") the design of it.
I also built a touchscreen controller for it.