My experience: We had a nice apartment in Morro Jable. When we wanted to sell, last year, I tried Facebook, Idealista and local ads. Even had an 'Open House' day. All we got were idiots offering stupid
Money. And lectures from locals telling me the price was too high.
In the end we bit the bullet and put it with a local agent with connections in Gran Canaria. We added his fee onto the price.
He had loads of viewings, dealt with them all himself, and sold it to a French couple with ease. He had others standing by if that sale fell through.
We believe, maybe mistakingly, that an agent here gives credibility as the buyer has to give a 10% deposit. And he reels in many more buyers from abroad, some who buy on their FIRST visit! He also did all the contract preparation, Notary etc.
It worked for us, so just under 5% well spent (by the buyer
)