A few things to remember… the agent works for the seller so the seller is most likely the person who instructed the agent to give you the amount on the counter. (as insulting to you as it may be)How long has the home been on the market? How much equity do the sellers have in the home? How motivated are the sellers?
If he has the other offers then so be it.
When he sent you a counter offer did he write in the multiple counter offers area?
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Verifying that there are multiple counter offers is not easy. If you really do not believe this to be the case then have your realtor call the broker and ask if this is true. What proof do you have that he is lying?
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If you have a complaint then you can call the California DRE. However, simply filing a complaint based on an assumption on your part cannot be backed up.
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Again, it is quite difficult to prove other offers exist but when an agent tells me that is the case, I assume it to be true.
Several weeks back I made an offer for a client on a home in RB. We gave a fair offer, in the lower 1/3 of the price range. The Prudential listing agent said they had another offer and they countered us in a similar manner that you complained about it. My buyer got pissed and walked. The home is still on the market.
As someone who is quietly shopping for his own own, I run across many sellers who refuse my lowball offers. Similarly I run across listing agents who drive me crazy. Hang in there, ask your agent to have his broker call the listing agents broker if you REALLY believe this to be true.