The Vortex SparcAR cost about $150 plus shipping if you find them on sale some place. They use AAA batteries. At $160 shipped they're a super bargain...espcially when you consider they include their mount.
The three I put on these PSA cost $150 less than the single Aimpoint T1 I have on my wife's rifle ... and it didn't include a usable mount. After I added a LaRue mount I was $737 into a single optic.
Is the T1 better than the Vortex? ALL DAY LONG.
Is it 4.5x better..... I guess it depends on how much weigh you place on "value to performance".