GCs - one set was new 2 years or so ago during a group buy. The other set was used
Konis - Brand new from EAP 4 parts before they became BFBMW a few years ago
Bilsteins - Used
Control arms, tie rod ends, Offset bushings - All new from BMW, EAP 4 parts and a buddy who used to sell e30 parts
FWIW - Sometimes trying to save a few pennies isn't worth it. Consolidate orders and order once and you can get a better discount and save on shipping. Nickle and diming the parts sources isn't always ideal, they all don't make killings on these petty items and it's very competitive.