Let's see, what bits of kit do I have that you can't buy at a quilt shop.
Travel size/table top ironing board and travel size iron. It's small enough to fit on my sewing desk, you can get a 12" block onto it, and it's a nice comfortable size for pressing seams as you piece, whether they're long or tiny fiddly small ones (I do quite a bit of curved piecing). I only ever fish out the big iron and ironing board for pressing the whole top before basting.
I have a metre long (40") aluminium ruler I got from a toolshop which I love. It's light, and it's useful if I want to cut/draw really long lines as well as being handy for smoothing the fabric out when I'm basting.