The NAND flash memory chip market is a volatile one, and when it comes to scoring a deal on a solid state drive, it’s all about timing. Last year was the best time to buy, particular around Black Friday and Cyber Monday. Prices have gone up since then, but you can still find some decent bargains, like this fast Adata XPG SX8100 2TB SSD selling for $229.99 on Newegg today.That’s not quite the cheapest I’ve ever seen it, but it is well below its $299.99 list price. And if looking at a price history on Amazon, the average price on this model since it released in September of last year is $252.77. What makes this deal stand out is that it’s the fastest 2TB SSD I can find for the money.Adata XPG SX8100 2TB SSD | 3,500MB/s Read | 3,000MB/s Write | $229.99 (save $70 over list)View DealThe SX8100 is an NVMe drive, which means it shuttles data through the PCI Express bus (it plugs into an M.2 slot on your motherboard). It is rated to deliver read speeds of up to 3,500MB/s, and write speeds of up to 3,000MB/s. (That’s really fast).You don’t need that kind of speed for…