If looking to buy, i always make contact with an agent. More so newer ones - they seem to be very honest and helpful. i recently looked into Mango Hill and found an agent Ben Smith to be the best of the lot
Your question is very vague and should detail exactly what you are looking for as far as size of land and build goes and where exactly in mango hill the property is located. There are too many variables to consider. Realestate.com is your best resource otherwise. Or call up a local agent who is a specialist In the area.