Framework, weirdly, overcharges considerably for their SSDs. You can currently get a Samsung 990 Pro 2TB on Amazon for $390; Framework charges $625 for the Sandisk 850x 2TB, which has similar performance (and is being sold on Amazon for $530).

If you DIY your own SSD, you can spec a Framework Desktop for below $4k; but not much below. Roughly the same price.