How many eBay NPB's before suspension?

It's a long story but Seller wants me to pay fees to get out of transaction which I agreed but when I calculate Listing fees and Final Value fees it comes to $6.51 but he wants $9.60 because he says " listing fees for electronics are a bit more" which is bull. I got my $6.51 but using eBay's published fee schedule. When I emailed him to explain how he came up with $9.60 no answer. I will not be held hostage. It's not the money but the principle. Do NPB's drop off ones eBay account after a certain amount of time or does it stay there forever?
"The answer was in the Patriots eyes. Gone were the swagger and c0ck sure smirks, replaced by downcast eyes and heads in hands. For his poise and leadership Eli Manning was named the game's MVP. The 2007 Giants were never perfect nor meant to be. They were fighters, scrappers....now they could be called something else, World Champions."
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"The answer was in the Patriots eyes. Gone were the swagger and c0ck sure smirks, replaced by downcast eyes and heads in hands. For his poise and leadership Eli Manning was named the game's MVP. The 2007 Giants were never perfect nor meant to be. They were fighters, scrappers....now they could be called something else, World Champions."