I'm able to stock and edit the usual things a shop would be able to stock however as I believe this is a parts/mechanics shop I'm able to stock ores/ingots too, however I'm unable to edit prices for these, I will leave a example below of the set prices of the ores/ingots that can't be edited.
Excellent news! This has now been fixed by the development team and will be released in a future server update.
Thanks for doing your bit to help us keep the servers bug free!