NVMe prices have trickled downward, but are still higher than late 2023. I noticed that with Prime Day, you could save 20% off of some open box items sold by Amazon Resale. These are customer returns, and you can check the SMART data for power on hours. You should also check authenticity with the OEM utility, and register for the warranty once you're satisfied. Below are the two best PCIe 4.0 SSDs:
WD_BLACK 4TB SN850X for about $206 + tax:
Amazon Resale [amazon.com] has (Like New) WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive on sale for $257.39 - 20% automatically discounted at checkout = $205.91. Shipping is free.
slickdeals.net
Samsung 990 PRO 2TB for $104 + tax:
These are good prices, and you should decide quickly. Someone mentioned the SN850X is out of stock, but I see it as in stock right now.
Personally, I've had good luck with "Like New" items. I try to avoid the lower categories such as "Acceptable" or "Good."