I once made a bid on a property slightly under the asking price and the bid was accepted, then, upon reading the fine print it was said that the buyer was responsible for the real estate brokerage fee of the seller. So, I asked to see the amount they had agreed upon and this was so exorbitant that I ended up backing out of the deal (I had not signed the purchase contract yet). Then the real estate brokerage contacted me and asked to re-negotiate because they figured they had better get something than nothing. I negotiated it down to 1/5th of their original price and the deal went through.
Weirdest arrangement, so somehow you can push the costs of selling a property to the buyer, who has no say in the amount negotiated. It wasn't exactly a hot property so I think that factored into all of this but I'm still not sure if this was just an attempt at taking advantage of someone new to real estate transactions on that side of the Atlantic or whether or not this is a common arrangement.
As for the 7% mortgages: those aren't all that rare historically, but they were usually coupled with stronger markets and lower inflation. In a weak market agreeing to a high interest rate can set you up for future trouble. So unless you see a mortgage as a way to keep more options open rather than a necessity I'd advise caution.