hello Honeybunny442,
Last fall, I placed an order with "going bananas". Since I live in CA I had to purchase tissue cultured plants. They were small and $20 I think. They are now in the ground and about 3' and growing. I dont think TN has the same import laws as CA so you might beable to get larger plants. They are not the cheapest but they do sell good quality (so far). It would be cheaper if you knew someone with mature plants to remove a pup from. Sometimes people have luck at the online auctions too, sometimes.

here is a link, good luck,
-Ethan

Here is a link that might be useful: going bananas

I got all mine from here:

http://www.bananaplants.net/bananaplants.html

They were all good sized and healthy, shipping was VERY reasonable (6 or 7 bucks for as many plants as you order I think)and fast, the prices were great and they take CC payments through yahoo.