As you may know, I got my hands on large pile of NOS parts for all Citroen models. Since I own a BX I decided to keep everything for it, but some parts appeared that don't fit my car and I'm willing to sell them. They are mainly for S1 models. Here is the list:
1. Front wheel bearing, IRB IR-8062 (40x80x31) - 4 boxed, 5 without a box. 10 euros/piece.

2. Hub carrier bush (smaller) OEM 95494716 - 7 in a bag, 3 without. 5 euros/piece.

3. Hub carrier bush (bigger) OEM 95494717 - 3 in a bag, 1 without. 5 euros/piece.

4. NOS spark plugs NKG BCP6ES for BX 16. 1 euro/piece.

5. Mechanical fuel pump seal 1451.16 for 1.6/1.9 petrol. 1 euro/piece.

6. Steering rack bearing for racks without power steering OEM - 7910019858 - 5 euros.

And something without pictures:
6. Engine mount OEM - 1843.91 - 10 euros
7. Sofabex/Purflux mechanical fuel pump for 1.6/1.9 petrol, one without a box - Purflux PS8217 - 10 euros/piece
8. Right rear view mirror, one OEM in a box (Britex) and one copy without a box - 95619649 - genuine 30 euros, copy 15 euros.
9. Front left indicator Series 1 (small orange one) Valeo - 082041 - 10 euros, 2 availiable
10. Valeo right rearlight Valeo - 082065 - 25 euros, 5 availiable
Swapping for other BX parts is also an option!