First off you need to be much more precise on your documentation. What exactly does seller pay closing costs mean? Does that mean the seller will pay as many points up front for you to buy down your loan? Does this mean the seller will not pay any points to buy down your loan?
Second off sellers agent is the sellers brother and a mortgage broker. You are asking us if it is worth it to use him because you are being steadfast and not paying closing costs? Hmmm lets see… I don’t wanna pay a few thousand up front but am willing to get a p.o.s loan that will cost me thousands in interest over the next few years. That makes sense to you?
Have you shopped the loan to come up with competitive rates and closing costs so you can at least compare?
Seems to me that with a little bit of homework you can actually answer the questions yourself rather then posting them here.
Also you should be much more precise in what is covered and what is not. Recurring AND non recurring closing costs? Points buy down? If you put the homeowners insurance payment in escrow as a closing cost is that covered?
I am sorry if I am coming down hard on you but I am just shaking my head at this point. Between yourself and your realtor you should be doing a heck of alot of a better job defining what the heck is going on here.