Yeah so a few points here.
Firstly, the High Endurance series was not replaced with the Max Endurance series. Both are current offerings from SanDisk. Just because the 32 GB card is not currently available from Amazon doesn't mean it was discontinued. They still have the 64, 128, 256, 512 GB High Endurance cards in stock, and the 32 GB will probably be back in stock soon. In fact it was just in stock yesterday for $9.85 so they probably sold out temporarily due to the lower price.
Second, the 32 GB High Endurance cards are available directly from SanDisk on their website for $9.99, so why would anyone go to eBay to find them? Or to CDW to pay more than the manufacturer themselves charge (which also ensures that they're genuine)?
Lastly, even if the High Endurance had been replaced with the Max Endurance (they haven't), why would anyone want to pay the same price for the lesser-capable series? High Endurance is 40,000 hours continuous recording and 2 year warranty vs 120,000 hours and 3 year warranty for the Max Endurance.