How to get access to Magma

Despite Sage doing a lot, people still write to me asking about how to get access to Magma. Here is my advice:

1. You can buy a copy of Magma here for only $1180.
   
2. If your calculation will take less than 20 seconds (?), you can do it over the web for free. (Historical note: I wrote the first version of that website.)
3. In Sage, use the command magma_free('some string'), though I just checked and the Magma calculator has changed in a way that breaks this command again. I'll be posting a patch to fix this in Sage.
   
4. Most people I know who have Magma do not buy it, but get it in exchange for contributing to Magma (I used to get it free for that reason). Study the list of
   past and current contributors to Magma and ask the one you know the best. This is a list of people who definitely have a copy of Magma and know how to use it.