What happens if I don't close on a house I'm buying?

[Eric Bradeis]

So I'm under contract to buy a tri-plex. It isn't an "as-is" sale but the seller is refusing to make repairs. This is my first deal by the way. What I want to do is tell him, "either make the repairs or I don't buy the house." If he still chooses not to make repairs, can I tell him that I will pay 2k more than the best offer he gets in the next month or so? Can you go into contract again if the the first deal goes south? Or is there only one shot to close on a deal? I'm just curious. And I will consider any creative advice or recommendations. Thx.