Cheap is the word. $90 for a set of six from an E-bay seller with several other sellers advertising the same injector. They just copy from each other using the same photos.
I took a video of the process of checking my original injectors, then testing the knock offs and finally retesting the originals after they were re-conditioned. The following video does not show testing the originals, only the testing of one new injector and testing one of the re-conditioned injectors for comparison.
It was weird when I received 10 injectors in the mail instead of 6. I sort of thought straight away that they purposely send more just in case a few failed. (spoiler alert) Well no surprise there. I could not make a set of 6 out of 10 injectors.
The results certainly speaks for itself. Click on the image below to view the review.
Conclusion: you really are taking your chances when buying really cheap diesel injectors.