Many agents will call you to ask if they can market your unit for sale when you advertise in 99.co
No exclusive but have to do sellers checklist. This is required 7 days before a buyer can sign the OTP (buyer would already has done buyer checklist)
By giving permission, the agents will list in propertyguru, to cast the net wider for buyers, so to speak.
I did it this way and was fortunate to engage 1 very good agent out of 6 (6 listings in propertyguru!) and the unit was sold within the same month that I advertised in ohmyhome, directhome & 99.
After a week or 2, you'll know which appointed agents are good or bad in terms of advice, urgency and basically "whether working or not" (in Hokkien).
Though I wanted to save the 2% agent commission, I could not avoid in the end as very few direct buyers called for viewing.
Hope you'll get a good agent too.