A dime bag is $10. For mids or reg, around my area at least, there needs to be 1.7-2 grams in the sack.

For some good KB, it should be a gram.

For some really good 'dro', really good stuff, it should be like .6 grams.

Never pay over $15 a gram unless it's a brand name, you know it is, and it has to be imported in order to get it to you. Only then should you pay, say, $20 a gram.