Expensive? Considering what you get for your investment, I don't think so. Your investment is for test results, genetic matches across the entire database, as much privacy and anonymity as you want, updated matches, hundreds of DNA projects to choose from (https://www.familytreedna.com/projects.aspx), and they store your sample for something like 25 years. Pretty awesome really.
Admittedly, it is better if you make your purchase when the kits are on sale. Also, if you use this link to make your purchase, WikiTree gets a small referral gratuity. That gratuity helps cover WikiTree operating costs. https://affiliate.familytreedna.com/idevaffiliate.php?id=600