[MortalMonday]

I would't accept anything below $150 for a mint, sealed ME 2 CE (NTSC)
I'm sure people will want to pay between $100 and $150; but again, I would hold firm at $150. That's just me though.
If you put it on the market for $200, you might get that much, but it might take a little time to get the $200.

And to be sure, I'm not just quoting random prices out of thin air. I've been following this game's after-market activity for quite some time now; and prices have been sitting between that $100 and $200 range. Not too long ago, there was a seller that flooded the market with new, old stock of these CEs and prices dipped below $100 for a while.