You may be able to purchase it online, but SCS never sold old versions and I don't expect MAGIX will do that either.
If you find the old version, you may have trouble registering it.
SCS had 32-bit and 64-bit versions of Movie Studio 13 available. MAGIX seems to have rebranded it as VEGAS Movie Studio 13, but I don't know if they kept the 32-bit version available. In any case, I don't recommend that basic version.
Thanks for your reply. I have already contacted magix, but they wont sell any older or 32bit version. Thats a pity and i find the situation quite ridiculous to be the honest.
***
"Hello,
Thank you for contacting Magix Support.
The Movie Studio and Vegas lines of software are 64 bit only.
Thanks, that seems to confirm my suspicion that MAGIX has now dropped 32-bit versions of the Movie Studio line as well. SCS did still have them in their MS/MSP 13. They really should have made it clearer on their Movie Studio product pages. Quote: "System requirements, Microsoft® Windows 7, Windows 8, Windows 8.1, or Windows 10 (Windows 8 or later with a touchscreen required for touchscreen editing)". No mention of what Magix Support just told you.