I have been a fan of using real datasets to teach sampling distributions for quite some time. Several of my friends have helped me along the way, especially my buddy Jeff E.
This google doc will launch my current draft of the new lesson. Question #7 is especially rough at the moment. Note that you will need to create a google form for students to send their statistics to you. If you know how use response validation, use it make sure students give you only numbers.
I used the eBay seller research tool to grab data on 2500 Funko Pop sales. The query resulted in 2.7 million items sold for an average of $33.71. However, I did not have the coding skills necessary to dump all 2.7 million data points into a spreadsheet. I grabbed 2500 using a Chrome extension scraping tool and you can see the parameters of my “population” as you work through the activity.