I bought from US several times with no problem.
But, I bought last year a reserve canopy (PDR 113 from drop zone classified) the canopy never shows up.
I called the seller by phone and he said that the canopy was sent but that he had lost the mail track number (He is a pilot and he was temporarily in south America, he said).
After a month I started a claim to PayPal and they returned my money.
1 Ask for references, pictures, ask questions etc.
2 Use a third part if you can
3 Use Paypal