Thinking of Doing Stampin Up Demonstrator - Any advice??

I went to a really good card making class yesterday for Stampin Up and thinking of buying the demonstrator kit for £120.  Don't really want to do any demonstrating or selling at parties but wonder if anyone has any advice on whether the kit is good, worth the price, etc.  Also does anyone just do direct selling with people contacting you locally to buy products from the catalogues?

Any help or advice on this would be brilliant.

I will upload some photos of the cards I made at the event later today.