Does anyone know if there's any value in a 5+ year old 95% working SaaS web-app with a "very messy" codebase?
I personally have two systems (my first attempts at live SaaS systems) that have been just closed but have been working "live" for 5+ years- both made in Laravel with Angular 1.4 front ends, they look good! - but the codebase is "a pile of patches on top of a chaotic prototype".
One is a system made for physician doctors training courses; you can make groups, set up courses with calendars, send invite e-mails, and they can turn in papers and teachers can grade them, make pdf's of the papers, set up calendars with files for the students etc.
The other is an accreditation system, you can create an application template and invite users to fill in the application with a sleek interface with autosave etc, and have other people grade the applications.
I don't have time to maintain either system and have been wondering if the systems should be just retired or could be resold somehow, even if the codebase is not in shape to be "taken over" easily. A huge amount of works has gone into them.
Have anyone been in similar situations and have advice? :)