I read that the reason is Spanish vendors (in particular) tell the estate agent how much they want for their property and the estate agent simply adds what ever commission they feel they can get away with – on top.
The commission expectations/budgets seems to vary between agents. From what I’ve gathered 5-10%….
1 is what lonegroover said.
maybe one agency has managed to convince the vendor to drop the price and the other agent has’nt, or has not updated the listing, etc…
the vendor has removed the property from one of the agencies, and they’ve simply kept it on the site to generate interest (even at the old price)
one agent has put a bit more on top so there is some room to negotiate
one agent has dropped the price to without permission to make it look more competitve.