If you’ve ordered the LEGO Star Wars Nebulon-B Frigate (77904) on the LEGO Shop a few days ago, you may want to keep an eye on your order. I believe orders are being shipped out but I’ve also been told by several people their orders were being cancelled even though they placed their orders early. I was told that the set was sold out in about 20 minutes and they sold twice as many sets as they had available. If your order did get cancelled, try reaching out to LEGO Customer Service to share your feedback.
If you’re still looking for it, I suggest watching the Amazon page as there has been small restocks at the retail price of $39.99 the past few days, latest one being a few hours ago as of this post.