Ian White wrote:
I'm looking for about 1km of thin-ish solid copper wire, as cheap as
possible.
1. Solid, not stranded
2. To be used as single wires, in lengths of typically 10m
3. Could be insulated or bare, tinned or not; but not enamelled (unless
the price was very, very right)
4. Strong enough to cope with being laid on the ground outdoors, and
then generally trodden on and mowed over
5. Thin enough to be cheap.
About 1.0-1.5mm diameter would probably be fine.

As it doesn't have to be insulated, if it didn't have to be copper, I'd
suggest looking at fencing wire.

If it could be stranded I'd suggest looking at electric fence wire.

Owain