Ignoring the Romance Collection (unless that's your thing) there is a couple of suspense collections on sale at the moment if they are your thing which can be found using following URL:
https://vyrso.com/products/search?q=price%3a%5b0+TO+5%5d+AND+title%3a"collection"&Genre_Fiction=Suspense
Just remember to search your library first to see if you already own the titles as individual volumes so you don't end up purchasing twice. For one of these collections I owned two out of three of the titles but it was still cheaper to buy the set, rather than the individual title as a separately.
