MAC Fix + Spray retails at about $21. Compared to E.L.F Makeup Mist & Set for $3.
Urban Decay Eye Shadow Primer Potion $19 compared to E.L.F Eyelid Primer at $1
Last but not least we have Smashbox Photo Finish Primer for $36 and NYX Studio Perfect Primer for $12.
The only difference in most of these products in my opinion is how long they last and how they show up in High Definition photos. But if you're just looking for a cheap alternative for everyday wear these a perfect.