There is truly nothing too wrong with cheap propellers. All these propellers are made in China, including the original one.
We know the drone cost us $1,500 each. To be honest, I refer to this drone as worth more than $2,000. I am sure there are very few people who have spent less than $1,5000 for this drone. This drone is actually $2,000 and up, after you add all the accessories and extra batteries you buy.
When nit comes to propellers, I think they are truly a vital part and originals would be the better choice, but DJI is really making it hard with how expensive things are.
DJI is selling 4 props for $30 plus shipping. SO, a total cost of $35 to $0 delivered.
The Amazon link is selling the genuine DJI props. 4 props for $28 delivered. That is cheaper but not too cheap.
Yesterday, I saw and bought 4 genuine DJI props from ebay at the cost of $20 delivered.
The seller has 16 sets (a set has 4 props). After I bought mine, it says he has 4 sets left. Since we cannot put a ebay link here that will take someone directly to the ad, here is the item number for you to put on ebay and search for it. EBAY ITEM # 283126928169.
3rd party props on the other hand are truly dirt cheap. I have a total of 8 3rd party props. My first set of 4 cost my $5 delivered on ebay from China! I have used it and it was just fine, but it truly feels a bit lose than DJI original ones. My second set of 4 props cost me $9 delivered. All from ebay. Then I went crazy and bought a set of carbon fiber for $14 delivered from China. I should be getting it in a week or 2.
Based on the price difference between 3rd party and DJI originals, I can see why some people will go with 3rd party. Nobody has done a test to show if aftermarkets will suddenly stop and make your drone fall. But on a very serious note, when I had my Mavic Pro, I sued a lot of 3rd party props and I can honestly tell you guys that after a few uses the props would truly be loser. So, I was not happy. But before I even thought a lot about this, I had already purchased these aftermarket props.
I think I may just order about full set of 4 from the seller on ebay for $20 delivered.
My experience is that 3rd party props get a bit more lose after many flights. Just my personal experience.