Looking to buy a track bike

The urge to race track has hit me again, but I've got a dilemma - no money. So I'm on the hunt for a cheap but good track bike. I thought I'd share what I've found so far for sale - some are out of my price range.

What ever I buy will double as my ride to work bike, so I'll be happy to get something old and rusty then do it up. But that chrome 3 Rensho sure looks tempting...