Also, "if" and "likely" aren't really good sells to try to say a card is overpriced.
No, I think they're pretty good reasons. That was just the first scenario I thought of.
So if mine cost 7$, it's basically a Grand Market which is easier to buy, except it's better than Grand Market 99% of the time.
I'm not sure where you get "99% of the time." The extra money of Grand Market on this turn is pretty big, which is why it seems to dominate a lot of games it's in.
Regarding Conspirator: A. They won't give you a buy and B. They will only give you +1 action in the right hand.
Yes, plus buys are nice, and Conspirators are a little hard to set up. But two conspirators will yield $4 on a single turn when set up correctly, where Fair will yield $1. That could be huge in the end game when you really need it. Consider that Expand is at $7, and it can turn a card worth 0 VP into a card worth 10 VP (turning Platinum into Colony).
And "mega-market"? really? That might be a nickname people would call my card if it was real, but as an actual name? really? really?
Actually, not really. That was a joke. I'm not so tone-deaf to theme that I thought "Megamarket" would be an appropriate name.
Instead, I'm going to suggest "Wal-mart."
Edit: Sorry, I meant "Nautical Wal-mart."