Lesson learned here. Safe tip is If you haven’t heard of them, avoid them. Unfortunately the modular bumper is a highly scammed item, along with hard tops. Another good tip is to vet the hell out of them. Ask them tons of questions, additional pics, video, piece of paper with their screen name next to the item in question. Explain that you’re just trying to be safe. If they get frustrated or impatient, or if they pressure you too much, it’s likely a scam. A real seller most likely won’t be bothered by the questions.
Another tip that I strongly encourage when buying used parts is never ever pay via Venmo, cashapp, paypal friends and family, or Apple Pay. ALWAYS use PayPal goods and services as it provides buyer and seller protection for a small fee. The fee sucks but losing hundreds of $ sucks worse. Sorry you lost your money