How do unlisted shares work?

The unlisted shares are dealt over the counter.

Unlisted shares are the shares of startups, employees, promoters, IPO aspirant companies. Unlisted shares can be bought or sold directly or through brokers who specialize in trading unlisted shares.

The minimum ticket/lot size for investing in unlisted shares is slightly higher. You can check the price at which the unlisted share is trading and then agree on a price that suits both parties.