Since you are non resident Kenyan my candid advise is hand over the land to a reputable real estate professional let them market it for you at agreed commision, this serves you all the stress and explanations.
It is worth it to take the trouble to travel down to see estate agents, show them the title documents and take them to visit the land.
If you have a notary public represntative, they can equally handle that for you.
Keep your asking price at 23M but let your agents know the last price.
PS
Luckily you are now in Kenya, so the ball is in your court.You can try award winning Haasconsult
www.hassconsult.co.keI am sure there are several others.
The wazua spirit as members is to educate and inform and learn from others within the limit of what we know in any chosen area irrespective of our differences in tribes, nationalities, etc. .