It best to set your limit and bid to it. Its easy to get caught in the trap that its only $25 or $50 more than my last bid and end up paying a lot more. Also you don't know how high the winning bidder may have been will to go. They might have bid up a lot more, so maybe you wouldn't even have got it for 2 grand.
And in my case, anyway, I can always find another gun to spend money on.