Viewing a small list of apps you've purchased is one of the things the Play Store does not do. You can see a list of all the apps you've ever installed, but you can only sort by installed or alphabetically sorted date. Fortunately, a new app is available to solve this problem.
Purchased apps from developer Asapha Halifa give you the same list, but with much more powerful display options. Sort by price (high to low) and you can conveniently view all apps for which you have spent money. Tapping on it will take you directly to the Play Store so you can reinstall it. This is especially useful for games you forgot even though you spent a few dollars on them.
The app is pretty simple in design and uses outdated material design stylings, but it does the job done. The drop-down menu shows how much you spend on apps and games overall. In addition, there are categories so you can look at certain types of apps. There are also options to change the currency and date format, if necessary.
All in all, it's a really neat app that does its job well. You can even export and share your list. It shows additions, but they are not too intrusive. If you're not like Rita, and you can easily sort and search any Play Store receipt email you've ever received (yes, me either), this app could be really useful.
One thing that is unclear, who gets installed during a sale, comes at a retail price or current full price, but I contacted the developer to find out. Try it out by installing it through the Play Store or downloading it from APK Mirror.