It’s not zoom level, it’s the quality of the glass, the repeatability, the features, etc…
http://swfa.com/US-Optics-5-25x58-SN-3-35mm-Riflescope-P47398.aspx
5-25x zoom, $3,139.95.
http://swfa.com/Leupold-11-8x24-Mark-8-CQBSS-34mm-Riflescope-P51639.aspx
1.1-8x zoom $3,799.95
Here’s mine:
http://swfa.com/Vortex-4-16x50-Viper-PST-30mm-Rifle-Scope-P44561.aspx
4-16x zoom, $899.95