Anandtech published Best SSDs: Q3 2018
A quote from the article:
SSD prices continue to decline, even as DRAM prices are on the rise. Most of the industry has now completed the transition to 64-layer 3D TLC NAND flash memory, but supplies of many older generation models are still plentiful. In most market segments our top recommendations are current-generation drives because 64L 3D NAND brought significant improvements to performance and power efficiency, but some older models are cheap enough to be very compelling deals.Best SSDs: Q3 2018
Above are some recommendations of good deals in each market segment. Several of these aren't the cheapest option in their segment and instead are quality products worth paying a little extra for. The next table is a rough summary of what constitutes a good deal on a current model in today's market. Sales that don't beat these prices are only worth a second glance if the drive is nicer than average for its product segment.