Searching for an awesome navy blazer

[freddiethebass1]

Ok, so I am in a mad rush to find a navy blazer for school. I'm pretty much as tall as they come (6' 8') and 180lbs, so it needs to be slim fit. I recently bought a ck collection blazer from off fifth for about 80% off and it fits great. But with my budget (300) I'm trying to find the best place to buy a navy one. Should I just go back to off fifth or Nordstrom rack and get one there or buy it online somewhere? Any good sellers (eBay) or sales (anywhere) that anyone can tell me about? I'm kind of worried about spending that kind of money on eBay unless I know they are a good seller. Help!!