Early KK hand

[Jackrabbit Slim]

This happened in the 2nd hand of a low buy-in SnG today.
All start with 1000 chips and not many have moved around in the first hand. Blinds are 10/20.
I'm UTG with KK and raises to 80. All folds to CO who calls, Button and SB folds and BB completes.

Flop comes 987 with two diamonds (none of my kings is a diamond). I bet the pot which is 200 and CO thinks for a while and then pushes all-in. BB quickly folds and I do?

Should I have raised more preflop?

[Insty]

Call.

Most likely you are ahead and he'll show A8 or A9 here. (If that)

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Should I have raised more preflop?

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At low buy-in if he's paying 80 to play he'll be paying more to play so it doesn't make much difference.