I think I saw 11 lb. digital scales at Walgreens. I'm not sure how the measuring increments go (they might just go in 1 gram increments), but they measured in grams and ounces. $30 is sort of a rip off though, i'm sure you can find a better, more accurate scale for less on eBay or somewhere else.

Keep an eye out for 'Pocket Scales' or 'Gram Scales' though. Something similar to this.
120-Z Scales *My Weigh Pocket Digital Scale Mini*

Chris