Considering buying a '91 Firebird
 

I'm thinking about buying this really awesome '91 Firebird from my brother's friend. It's only $700 (since the guy is desperate to sell it being that it's taking up room on his property), it needs a little work but other than that it looks great. Trouble is I'm worried about how much maintanice is gonna be. I'm just now learning about all the technical stuff about cars so I'm not that knowledgeable, and people are giving me mixed opinions on if I should get it or not. I want it BAD but will it run me a lot of cash or need constant work?