I used to have plants in an old wheelbarrow saved from ending up at the tip. Over several years I grew various vegetables and flowers in it. When we moved house it had to stay behind. Some time I would like to get one again.
Yes, it's a common trick in my family - my grandfather and my mother both use their old barrows as planters when they wore out. The holes in the bottom mean they drain well and they always look completely at home in a garden.
A neighbour in my unit block, who's a gardener, has done this with maybe one of his clients old wheelbarrows filled with some plants in the common lawn area near my back door. One plant's a succulent thing that really doesn't need much work.