I don't know about the price thing, Sarah. I bought a nice just-above- the-knee skirt at Wal-mart last week for $5, and a pair of like new red patent (real leather) 4" heels at Goodwill for $3.50. Not a bit of use, judging by the soles. Maybe they weren't someone's color, or they couldn't handle 4" heels. Probably not my best color, either, but I could not help myself. I even found a bra/panty set at Wally world for $11, and seeing as they are hard to find in matching sets, of course I had to have them, too.
I don't know if you ever truly lose the nervousness, but it's part of the thrill, too. And you do learn to ignore it. I understand why women have sooo much fun shopping. Even if you're just looking, or as my wife says, "eye-shopping".