Large suitcase with wheels (Little Downham CB6)

I am making a trip overseas and need a large suitcase or travel bag for airline hold use. It would ideally be in well-used condition, nothing fancy, the plainer the better. It is for taking a donation of clothing to an impoverished part of the world. Wheels and a grab- handle essential for moving it around. Needs to take about 20 kg of clothes. Thank you.