system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How did Owen Lars not realize that he had previously owned C-3PO?

In a New Hope he buys 3PO from the Jawas, yet we see that 3PO was on the Lars homestead after he was presumably sold along with Shmi, so what gives?
gpt
One, protocol droids are pretty common, even on the Outer Rim territories. Two, droids are like appliances, and hardly regarded with much thought. Anakin and Luke are actually pretty unique in how they speak to their droids. Finally, C-3POs casing was completely changed, and 3PO didn't act as if he knew Owen, so why would Owen care?