I made one about 5 years ago and it was the best bit of a quilting notion I have ever put my hands on, it folds away so easy but when I am quilting it is there by my side with my magic travelling iron, couldn't be better. Would recommend everyone to make one, never mind the thrift stores just go and buy a good WOOD TV table, so easy to make.
A tip, what I did with mine was to make 2 covers from Pillowcase, put elastic around the edge so it slips over the top, easy to take off to launder, well you know what horrible stains and colours ordinary ironing board covers go!