Hi there!
That’s like entering a church and asking if Jesus really exists/existed.
Now we’re not a religion 
but most on this forum think the products do work - and not just for fun, but many of the people here have been sceptics once and gave them a try and became customers for life 
Define “starter purchase”, please. There’s a killer kit available for purchase with all kinds of products so you can test them all, and it’s quite cheap. If you want a “starter purchase for a specific situation”, it would be a good idea to tell us what you want to use the products for, age ethnicity gender of your targets (if you have specific targets) – as many details as possible. That way you will also qualify for the gc 