Since we never thought things would go down so fast with OSClass.org, in order to help mainly new installation, we have prepared an full Osclass 3.8 with the following changes.
1. Updated to Bender theme from 3.15 to 3.20
2. Included 12 file changes to strip Osclass Market and Updates dependancies, so your site and admin will not stall or totally crash, due to the fact that Osclass.org and the subdomains have been shut down.
Since the Geo database has been also shut down, you will not be able to install a new location (country) during the installation. Also you may experience a pause for a minute or less because of the missing geo database server. Do not worry, wait for the timeout to happen and finish the installation. Then manually import the location you want from the forums here.
Thanks for that, FOUND at least! it's gonna be the starting point
Best Regards
Thanks and Welcome, you could also try 3.9 if it doesn't break anything in your site.