They try to scam you
I bought a laser which was not available. They never reimbursed despite promises and several e-mails. Then they repeatedly tried to get me to cancel the PayPal case I had created because it would take ”longer” for them to pay me back for a product I had never received. If I had cancelled the case I would quite likely never have received a single cent back. No product received, bad communication, no refund. I’m incredibly happy PayPal took my side and refunded me.