A year after the Curiosity rover, they were out of stock and being resold at a handy markup on ebay. Hopefully the 2020 rover will get a model too so I can get it in time. I'd advise not to sleep on this.
The last time I was in the Lego store in Bellevue WA the sales clerk was actively encouraging me to buy four or five of a Star Wars item and to sell them on eBay for profit.
