I've been playing with compressors, but to get the nasty noise I'm aiming for I need a studio comp rather than a pedal.
So, for sale are:
EBS Multicomp, with box, SOLD
Guyatone BL-2 bass limiter, with box, £30 posted
Tech 21 Bass Compactor, no box, £35 posted
All working great and looking good.