PDP11/55 sells on Ebay for 5K$ - was it really the fastest 11?

[Heinz Wolter]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5766828959&ssPageName=STRK:MEWA:IT

looks like Guy S. sold a PDP11/55 for 5K! is that really the going rate?
wow!

Don't want to start the old "Ebay ~is~ the market" thread up again... but
on a technical note - the listing claimed that it was the fastest PDP11 of
the blinkenlights
machines made by DEC.. Is that true?

 I expected  an 11/70 to be instruction for instruction faster - but
add all the cache and complexity - maybe the 55 with bipolar ~was~ faster?
How about compared to a 11/70 with a PEP70 instead of factory memory and
cache?
Isn't a 55 just a 45 with bipolar instead of core? or was that a 50?

h