Out of season produce is always a winner, my brothinlaw works at the Perth fruit and veg market, and we have spoken extensively about the possibilities of making money from different sales. It comes down to producing out of season, if you want to sell on the open market, otherwise it's very hard to compete with all of the already established growers...
Luckily greenhouse growing can put you a step infront of some growers, and I imagine that as oil prices increase then transport will put the prices up on out of season produce thats trucked or flown in from distant places.
Here's some price info from the Perth market, quite useful...
http://www.perthmarket.com.au/produceinfoframe.htm
AA, go into the download section, here you can upload most types of files including spreadsheets, you could then link to the download in a post here.....
