So from what I gather it's worth the 30 bucks it's being offered for , only to check about the frozen stem issue and the rusty bottom bracket (as vixtor and carleton pointed out).

I'm not from the States, where I'm from you can't get a fixed gear nowhere, there's simply no fixed gear culture, nobody rides them, nobody sells them, and shipping anything larger then a hub would be expensive I imagine. And I'll hunt for flip flop hubs and sprockets and stuff on ebay or something, while cranks, bars, pedals etc. I can find here.