1. Read the above two critiques and fix up the tone and grammar.
2. Pet peeve:
found by a member, at a yard sale of Mr ███████.
I would downvote for this line alone. It sounds incredibly stupid and unbelievable for Foundation employees to find SCPs at yard sales, or in a cute little shop while on vacation. Do not do this. Leave out the "how it was found" bit if you can't think of something reasonable and interesting.
3. You like to use "appears" in the annoying way i.e. "SCP-XXXX appears to be a robotic head." SCP-XXXX IS a robotic head. When you use "appears" you are suggesting it looks like one but actually is something else.
4. Do not label part of your SCP as "-J" as that suggests it's a "Joke SCP" and will confuse people.
I actually like the idea of somewhat confused ancient robotic invaders, but this needs to be written up better to work.