The first step would be to list it here...
Then we will share it on our Facebook page.

You may also want to hire a Property management officer to make the task easier

I agree with mel_robbins, I mean if you are not sure of how exactly you will have it sold maybe look for someone who is a professional for this such as mentioned by mel_robbins or consult a real estate broker.

hmm hanap ka ng mga website na nag sesell talaga mismo ng real estate or advertise ka on facebook.

Agree ako with MelanieOmpico, or if not try doing it by word of mouth.. offer mo sa kakilala mo tapos if di man sila interested they can share it din sa iba.

Find an expert on reselling a condo. Maybe this will help you. Read some tips here: https://leasing.dmcihomes.com/how-effectively-resell-condo/