Poser 12 for $49, apparently. Via Graphixly. The “Windows 10” claim is questionable. It runs fine on Windows 7, though I guess it’s possible you won’t get support-desk help if you’re on older Windows versions. And some store-bought P12 third-party scripts won’t work on Windows 7 (which lacks the required Microsoft encryption modules).
Over at NeoWin, Poser Pro 11.3 is now $79. It was a huge $150 on Renderosity, last week. Ideally a non-photoreal user would want to have both 11 and 12 (they can co-exist happily), and the current discounter prices seem the best way to do that at present.