Playing around with the National Agricultural Statistics Service and some of my other reading recently (for shade tobacco):
2007 Connecticut, Rough numbers, wholesale pricing:
Broadleaf Tobacco $11,712/acre
Shade Tobacco ~$30,000/acre
Sweet Corn $2,160/acre
34 Vegetable Mix $2,160/acre
Which is why market gardeners need retail sales or Community Supported Agriculture in order to make it. Even then the market gardens often are combined with other enterprises or off-farm work to make ends meet for a family.