on sale

my parents are planning to sell a property we own but is thinking if we should sell it through a broker or just have it advertised on land for sale. i say we have it advertised online as it will surely attract more buyers and it's going to be cheaper that way since we don't have to give broker a commission. selling stuff online has been convenient and a lot of people go online every time they would have to buy something. i told the parents to just try posting the ad online and then we will see on what responses we get. if it doesn't work for us, then maybe we could consider getting a broker.