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.