OK, I’m a little OCD… Here’s what I do to see if the products I buy and use are a good value or not.
When I open the product, I write the date on the bottom so I can see how long it lasts. I keep a sharpie in the bathroom medicine cabinet because I do this on all my products. If I’m spending money on products I want to know I’m getting value or not. If I spend a LOT on a product and it only lasts a short time, maybe it’s not worth what I paid. BUT if the results are better than anything else I’ve used, I factor that in, too. Ultimately YOU are the judge.