That tends to be my approach Cloud. Until I have to go somewhere and realise that the bag I am carrying (held together with safety pins and a prayer) is entirely unsuitable and that forces me to go buy something cheap from the market.
I usually have two bags on the go: one big one, big enough to fit in files and boks and assorted junk and one smaller one, big enough to fit in assorted junk and maybe a single book.
However, I tend to also 'acquire' bags, I borrowed one off mum to go somewhere and she said just to keep it, so that ended up replacing the falling apart little bag. Now though, I have two new bags! One is a kit bag style but with big flowers on it, for carrying books and files etc. And the other is a fairly stylish soft leather handbag (purse). I think they probably cost about £20 and £30 respectively. Which is waaaay more than I would ever spend on bags for mysef, but these were bought me as gifts