Flopped straight

[Geo]

Dealt T 7 . Early stages of SNG, blinds 10-20, chips stacks from 900 to 1200. No one has bet anything larger than 50 thus far.

3 limpers around to you in SB, BB checks. No real reason not to at least pay 10 for a flop.

Flop is:

6 8 9

I bet 200 (2x the pot) and was raised all in and lost to JT when a Q hit the turn.

I read this on another forum and the replies were ranging from fold preflop, allin on the flop and it was played just about right, I think it was played right. This is why I call 10 more chips so I can flop this type of hand, hands like 10 6 and worse I fold easly.