After working in the industry and previewing crap apartments yes the consumer needs a buyer's broker to save them time!!! I try to preview as many units as I can for my clients because you will find the ones that very undesirable either facing a brick wall, no view, too small, lousy renovations. The last thing you want is to take your client and both of you are shocked when you walk in. The second is we have a good idea of the building and their amenities, we might also be familiar with the building's financial etc.. The third issue is if anyone is going to kick the seller's brokers ass it's the buyer's broker, regardless what everyone says negotiating is a contact sport like or not and you want someone in your corner that's not going to back down. You want someone that's going to fight for every penny and will ask the important questions, for instance "is there anything else I need to know? Are there any unexpected issues, assessments that we need to know? I want to agree on or about a closing date and let's try and stick to it if possible" questions like that are vital. Good luck!!