Don't be ridiculous. Solid hardware and software combos for windows cost a small fraction of that. The convenient and decent Tobii PCEye costs like $1,250 and a very nice TMS5 mini is under $2,000. Your bullshit was off by at least an order of magnitude.
Let's be fair and compare similar products. Do you have any examples of $2000 mobile devices that support eye tracking on the OS level? The products you mention look like they're extra hardware you strap to a Windows PC. Certainly useful, but not quite as potentially life-changing as having that built into your phone.
