You can put them anyplace you like.
Pick a domain of yours, anything you want. Surfers will go to the root of the domain poking around so put something good there.
You could use your paysite and do something like this,
http://LindaMight.com/free-samples/sexy-lingerie/index.html
http://LindaMight.com/free-samples/red-dress/index.html
http://LindaMight.com/free-samples/outdoors/index.html
http://LindaMight.com/free-samples/bedroom/index.html