Bearing in mind that the cheapest new stuff you can buy (primark/asda) is 3 baby grows for a fiver, I wouldn't pay more than 50p for a second hand baby grow in good nick, or 20p for a vest Socks are actually quite expensive for babies If the bundles will be picked up rather than posted I would do ?5 bundles, say 5 baby grows 5 vests Then make it up with some socks, couple of cardis For older kids, say 3 dresses or 3 tops/trousers, again for a fiver.