All of my trees are end of season clearance leftover "charlie brown" trees. If you look at the top of the page you can see how one is doing (It made picture of the week)
Sorry to say, but I think you just missed the best seasonal buys. Over the past few years I have bought 4 fruit trees from Farm & Fleet's seasonal Garden Center. They close it up in early July and they put all trees on 50% sale in the last weeks. Two of fruit trees cost $15.00, and the last one I bought a few weeks ago at $20.00
Meijer, Rural King, Home Depot and Lowe's don't give you as good a buy.
When you DO buy a fruit tree--this year or 2011--Buy a (cheap)Super BIG pot (like this one) http://www.horseloverz.com/Much-Bucket---black---Quart-pr-574835.html
and immediately transplant it INTO THE POT and close to a water source. You will want to keep it WELL WATERED to get a good root system going. Come September or October move it to it's permanent place. Then, you'll dig a hole a little deeper than the roots and twice as wide. I throw mulch in before the tree goes in, then I cover with mulch and sometimes I have staked it to help during the winter.
I have successfully transplanted fruit trees this way four times. The ONE time I put a tree straight into the ground after I got it home, it died in a month.
Costco here got in some NICE fruit trees ONCE in late spring. I got some peach trees for $12 each that were costing from $24 to &28 everywhere else for that size. I'd like to have gotten them even cheaper, but I don't think I could have gotten such healthy trees that already bore this year for me (one of them had the BEST tasting peach I have ever had in my life!). I'm hoping for a good harvest next year, but spending the $12 seems to have been very worth it.
Never did get apple and plum this year (which I also want) or blueberries. Hopefully next time.