We just made a bunch of 1950's and 1955's available.

Currently have 13 x 1950's with the following specs:
Dual x5355
8gb ram
Perc5i w/bbu
Dual PSU
Dual port Intel GB (expansion not on-board)
2 x 3.5" model
all parts + rails

Asking $900 obo
colo/dedi available in Equinix NY4

I'll post the 1955 when I get the final list.