I have 3 batches of butterfly labs chip credits for 16, 16, and 32 chips. Each credit is worth $25 discount per chip.

More info here

https://forums.butterflylabs.com/announcements/3272-customer-appreciation-chip-credit-program.html

Open to escrow.

Asking 2.5 BTC (or litecoin equivalent) total or best offer within a few days. (works out to $3.87 USD per credit @ $99/BTC)