M.C.
I bought everything I need to make my DD a pirate costume for $8 at Joann. She's little (18 mos), which helps. I bought 1/2 yd each of white-and-red striped fabric, plain black fabric, and skull-and-crossbones print fabric (all from the quilting section at the back of the store, NOT the much more expensive costume fabric section at the front). I'll use the first two to make a two-layer zig-zag hem skirt, and the last to make a head kerchief. I then bought 1 yd of black felt, which I'll use to make a little vest (no hemming needed with felt) and "pirate's booty" bag (I'll embroider on with some white yarn I have). She'll wear her own white t-shirt underneath. I already own thread, elastic, and a ribbon I'll use to lace up the vest in my sewing supplies.
I do sew, but these are REALLY easy things to make, since a pirate is SUPPOSED to look kind of raggedy! If you want more detailed directions, PM me and I'll be happy to help!
Part of the reason all this was so cheap was coupons--go to joann.com and sign up for their mailing list, and they'll email you some. GL!