The test shows that SSDs with PCIe 3.0 are no longer worthwhile. The test specimens are not cheaper than entry-level models with PCIe 4.0, are partly very slow and use outdated components. The Mega SSD falls out of the candidate list due to its high probability of failure.
The cheapest model in the test is the PCIe 4.0 SSD Kingston NV2, but you have to play the component lottery...