It's because of their new formula : priceHike(GigaRAM) = 40*GigaRAM - 20
Also, the person using a minus sign in Apple pricing formula was reportedly fired.
SnazzyLabs also did a comparison, including an unboxing, microscopic examination and hydro-absorption tests. Quinn cracks me up; note he has a similar item for sale and includes it in his tests (and I have no financial interests here).