Breastfeeding Tops?

Have you tried Target, WalMart and/or Old Navy?

ditto exactly what laura c said, stretchy tanks under loose tees is best, cheapest, most comfy, re-usable, and everything stays covered.

Breastfeeding tops are kind of expensive and definately unneccesary.
I just wear a stretchy tank top under my shirt if I think I will have to nurse in public. This way i can pull my shirt up the neck of the tank top down and not have my stomach exposed.

Just a suggestion though! If you have the money to spend go for it!
I think they sell them at target too, but not sure. Search for specialty stores in your area. Here in DFW there are a ton of boutique type motherhood style stores

Target & walmart all the way.
You can get some really comfy BF tank tops and shirts for about $5 - $10.
That's where I bought most of mine. I think it's crazy to spend obnoxious amounts of money on things like that. Plus Most of the time the expensive stuff isn't that comfortable, well in my experience anyway

Motherwear.com

Also, as Laura said you can just use a normal shirt and get something like Blush topless shirts to go underneath. I have both, but I prefer the nursing tops.

Target (and I think Walmart) sell nursing tanks in the bras section. They are just like nursing bras, but they're tank tops. They come in white, black and grey. I wore them under a t-shirt. Very comfy!

My most favorite tops for breastfeeding were Diane Von Furstenberg faux-wrap front maternity tops. I would find them on Ebay. They looked great post-preg, they don't drape like a maternity top if you have lost your belly and they seriously camouflage the belly when you still have it. Look for ones that just criss cross in front, no ties or anything, they should also have ruching on the sides. Hope you find some at a good price!