I placed an order for some oop Estes rockets from NDHSKBD in early January of 2021. I paid it through PayPal; they said it was supposedly shipped via USPS. USPS said it was delivered to my doorstep 18 hours (!) later, but it never arrived and there were no footprints in the snow at my rural home. NDHSKBD did not reply to subsequent emails, but last time I checked their website said that my order was processing. I've since been informed that they're a scam site. It's interesting that the perpitrators have also apparently penetrated PayPal and the USPS, and the USPS is lying to me about the delivery (my local postmaster assured me that she had talked to the carrier, who was certain that the package had been delivered).
This scam cost me about $120. Lessons learned: don't trust the USPS, don't trust internet rocket vendors that aren't on TRF, and be extra careful about purchasing oop items at retail prices.