[Brajeshwar]

Besides the suggestions in the comments; add a ribbon/banner on the top of your site that it is on Sale. There also used to be lots of forums for buy/sell of domains/businesses. I'm not sure how they are these days.

About 10-years ago, I was approached by someone (who turned out to be a broker) for a pretty common tech-word domain. I sold it kinda cheap. Later, I learnt that the buyer (or final owner) was a one of the world's top tech billion-dollar company.

I think I just ran a simple blog on that for a while with a little banner that sold "Domain on Sale" or something in that line.