First off, that's definitely not an ounce... looks like a quarter (as someone mentioned) (Quarters weigh 7 grams by the way, and an Ounce is 28 grams... definitely make the guy use a scale next time....) and paying 70 bucks for a quarter of schwagg or mids is definitely not a good deal.... Prices where I am:

Schwagg:
$25 a 1/4
$40 a 1/2
$70-75 an Ounce

Mids:
$35 a 1/4
$60 a 1/2
$85-120 an ounce

Dank/Hydro
$50 an 1/8
$95-100 a 1/4
$185-200 a 1/2
$300-375 an ounce

I rarely get anything but dank or dro, but that's prices where I'm at..... but yeah, next time you get an "ounce" make sure it's weighed out in front of you or make sure you have a scale... getting ripped off on weed is a bitch...