These have been in our garden, unused, for a long time. They're a bit rusty, could do with a good clean, and the nets are rather green, but I reckon they're good for a few games yet.
Each goal is about 5ft tall, 6ft wide and 2-3 feet deep (I haven't measured exactly).
Might take a bit of ingenuity to get them home (or a van!), because of the size and the fact that there's only the net to rest on. The screws are sufficiently rusted that I don't think you'll be able to take them apart unless you drill them out.