How much are old Better Homes and Gardens worth?

It depends on several factors. The magazine goes back to 1922, and usually, it's the earlier editions that are worth more, since they are harder to find. But the value of an old magazine depends on the condition it is in; how rare the issues were (some issues were widely distributed, while others are much harder to find); and if the magazine contains articles or photos about particular celebrities or famous people that collectors find interesting. I would recommend that you go on a site like eBay and see how much issues of Better Homes and Gardens are selling for; that may give you some idea.