I bought these lol, it was such a waste of my 4$......My gecko wouldn't eat them, they don't move, and I couldn't really see myself wiggling each one around for her......they're HUGE too! I threw them out eventually.
I only bought them because my parents let me get a gecko on the grounds that I wouldn't keep live crickets in the house :P....but it's too late now, I keep live crix and mealies.
I think anyone is better off buying live crickets and gutloading them yourself. You can buy the immature ones that don't make any noise too.