Clarins>plastic Is There A Difference Between Clarins Products In Glass And Plastic Jars Or Are You Paying For The Packaging?

Is there a difference between Clarins products in glass and plastic jars or are you paying for the packaging? - clarins>plastic

I want to buy Clarins Extra Firming Night Cream as a gift. The RRP is £ 41 and will be) on eBay, etc. for £ 27 in the glass container available, and I wish ml for € 17 in an alternative plastic (50th Person does not and can advise me?

Thank you in advance.