I sold a bunch of 4040s several years ago for $40 to $50 to chip
collectors. An early Engineering Sample (ES) should be worth about
$200 in my opinion, maybe a little more but the condition is not the
best on this one.
I found a gold 4004 in an early typesetter, an AM100 which I scrapped
in the mid-late 1980s.
Pax
--
Paxton Hoag
Astoria, OR
USA