Apologies for any confusion, but as an AI language model, I don’t have real-time access to property listings. However, I can provide general guidance on how to find 300 sqm plots in Pocket 7C, Sector 18, Yamuna Expressway. Here are some steps you can take:

1. Contact Local Real Estate Agents: Reach out to real estate agents who specialize in the Yamuna Expressway area. They can provide you with the latest information on available plots in Pocket 7C, Sector 18.
2. Explore Property Websites: Visit property websites that focus on the Yamuna Expressway region. These platforms often have listings of various plots and offer search filters to help you find plots of the desired size.
3. Consult Real Estate Developers: Check the official websites or contact real estate developers who have ongoing projects in Sector 18. They may have 300 sqm plots available or can provide information about upcoming projects that meet your requirements.
4. Local Newspapers and Classifieds: Keep an eye on local newspapers and classified ads in the area. Sometimes, plot owners or sellers advertise directly, and you may find suitable options there.

It’s important to conduct thorough research, verify the authenticity of listings, and consult with professionals before making any property-related decisions.