No offense, but being a consumer-oriented project, with these counts after 2 years, IMHO you need to shut it down. Anything else would be most likely more costly in effort trying to sell it than any cash it will bring.
Never tried it myself, but you may want to attend local enterpreneurship meetups, networking events and similar. If you have a passion for your product and it is working (you said it's growing in users, which is nice) I'm pretty sure you can sell it face to face.
I tried this with one of my projects. I ended up getting offers for a few hundred dollars on flippa. I decided to keep it but now it's always in the back of my mind. I think I might just have to shut it down so I can move on.
- DAU: 110 (Base on the last 31 days)
- MAU: 537 (based on the last 12 months)
We're pretty sure that it's because of the lack of evolution. We used to have better numbers...