I have 2x 20m and 2x 15m (I think!) that I ordered from Goldenstarlasers a while back, along with some parts.
Unfortunately they are slightly too high resistance over multiple lengths (e.g. 2 or more joined together) to ensure my safety board disengages (I run my interlock over ILDA)
They have been clogging up my room for a while now, so I could do with moving them.
I'd rather not split as they are all in a box ready to go.
£30 the lot
Shipping will be £10 by 24hr courier in the UK