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"$529 for Ultegra 6800 and $649 for Dura-Ace 9000, both including the non-drive crank arm."
"Their dual leg system also drops, coming in at $1,300 (Ultegra, down from $1,550) and $1,500 (Dura-Ace, down from $1,850), which includes the entire crankset."
"for just $579, you can send in your existing 11-speed Dura-Ace or Ultegra crankset and they’ll add single-leg power to the DRIVE side."
I look forward to seeing the bullshit UK price equivalent.
Pioneer is even cheaper now: http://www.bikerumor.com/2016/02/01/pioneer-power-meters-pricing-gets-even-more-competitive-ota-updates-more-coming-soon/