Not really.
You are always protected by the eBay (and Paypal) Buyer Protection program(s).
If the seller did not use a tracked service for shipping (which is a Seller Protection) and is slow about marking your item shipped, well, stuff happens.
Mark the last estimated arrival date on your calendar and if the item does not arrive by then, you can open a Dispute and get your payment refunded.
The Lunar New Year starts on the 28th and is a Big Deal in China, so there may be some slowdowns over the next week. Even with that it is normal for shipping from China to take 30 days or more.
But again, your money is protected.