Selling proprietary trading project code base?

Worked on a prop trading project for about 5 years first in crypto and then the regulated market. Developed large code base in c++ including strategies, trading application, backtesting, visualisation and ingesting tools. Despite having found some strategies that seemed promising in experiments never managed to build track record to raise capital. I traded my own capital day to day and had colocation at the exchange. Invested a lot of time and money. Eventually put it on the back burner. I was trading medium to high frequency horizon. Any ideas how I could monetise this or auction it off?