I have a large lot of bits for sale on ebay. There is roughly 1,250 imperial guard and space marine bits for sale along with 21 decal sheets. At the auction price each bit is about $0.09 per bit. The buy it now option costs about $0.12 per bit. There is a detailed list of the bits on the auction.
1 250 Imperial Guard and Space Marine Bits and 21 Decal Sheets | eBay
1250 IG and Space Marine Bits with 21 decal sheets