Quite a few AT woodies -- I'd find it hard to part with any of the ones I've been lucky enough to pick up. Classic Grados also -- including early RS1 variants.
Edition 10, LCD-2, T1, DX1000 and RS1i.
beyerdynamic DT 48 & T 1
Grado HF-1/2 & RS1i
Sennheiser HD 600/800
STAX (most of their high-end ones)
Ultrasone Ed. 8/10