A place that looks cheap on screen can turn out average once you're there. It isn't a scam; it's lines people forget to look at.
Electricity, in residential buildings, is often billed separately, by the meter. With the air con on at night, it's the line that weighs most on a long stay.
Cleaning and linen aren't always included, especially by the month. Ask how often before you compare two places.
The deposit ties up a sum for your whole stay, and getting it back depends on the condition check. It costs nothing if everything is photographed when you arrive.
Platform service fees are often added at the very last step of payment. Compare final prices, not the ones in the list.
Transport, finally. An out-of-the-way place lengthens the transfer from the airport and means renting a scooter or taking more trips. Factor it in from the start.