Don't be mislead when you're buying props online for your Mavic, that happened to me on a popular website. Purchased 4 props thinking they were the DJI replacement, for a hefty price as well, only to get them delivered and disappointment as soon as I got them out of the box. They were super lightweight compared to the original DJI props but most of the reviews stated they were from DJI, mine weren't, wondered if I should even install them on the Mavic.
Then while online these props pull up, a new item, I had looked before but Best Buy didn't carry them then, now they do and they are absolutely the same as the originals, even the numbers match, "8330F CW". They are as sturdy as the ones that DJI shipped with the Mavic. The others that I purchased had the same numbers listed on the website but upon close inspection the actual numbers on the props were different, "3380F CW", not the same.
Best Buy sells 2 props for $9.99, and the max you can purchase is 3 sets. And, just to clear up some confusion on Mavic props, 1 motor = 1 prop, some people think because they're collapsible that it counts as 2 props, 1 motor 1 prop. Thanks Best Buy for selling the "real" thing!
The props in the picture:
Prop on the left, other online prop.
Prop in the center, the original.
Prop on the right, Best Buy.