Special Scene for Sample

I’m going to create a sample version of one of my books (for InstaFreebie). The end of the sample will include some text such as “If you liked the sample, you can buy the book at blah blah.”

I could just add that special scene into the manuscript and choose which version of that scene to use each time I compile, but it seems a bit dangerous (might choose the wrong version).

Any tip or trick for handling something like this?

Thanks.

I discovered that Collections are perfect for this. I’ve rarely used them in the past.