The simple answer is: sometimes.
As older folks like myself remember, there was a time when Japanese-made cars were "suspect". Things have changed quite a bit. A few years ago, Korean cars were equally "suspect". Again, things have changed quite a bit.
My problem with "direct from China" puchasing on eBay is that I am never sure if I've just donated my money to the latest scam-artist or not ---- unless I've dealt with the guy before. I've got 4 jerseys from China that are great. 3 auctions I placed bids on got cancelled by eBay for unknown reasons (I suspect scam detection) within the last 2 weeks. And I lost money on 1 really nice looking auction - never got the item, never got reimbursed.
Something to remember, China is a huge textile manufacturing location. Quality varies as do vendor reliability, responsiveness and price. Especially on eBay, checking shipping terms/prices and be sure to include them in your "is this worth it" calculation.
Note: Jaggar jerseys are definitely quality and can be bought "safely" direct from China via eBay. At least that's what I and some friends have concluded after multuple purchases.