Depends on time of season its hell dry in Hams @ moment all ppl i know out except 1. As such the ozs go up to 350, but normally 300 this is nice indoor.
Outdoor seems to be alot cheaper 200 - 250 normally.
Dont know where u get the 1 gram = $10 rule m8, 1 gram = a tin or so, = $20. But u buy in ounces then its around tht figure.