I have three servers running a Tor exit and a recursive DNS resolver each. These are $3.50/mo from [BuyVM](https://buyvm.net) ([Slice 1024](https://buyvm.net/kvm-dedicated-server-slices/))
My email server at [nixnet.email](https://nixnet.email) is on netcup's [RS 1000 G8](https://www.netcup.eu/vserver/). I also run [Postal](https://github.com/atech/postal/) on the same.
[^1]: Note that the price is an approximation. Converting EUR to USD isn't exact and comes with extra fees. The conversion rate could change though it isn't likely to be by very much.