BEST BUY - E39 BMW shop manuals

Is there still a group buy going on for E39 BMW shop manuals?
If not, where's the best place to get the best price on the best new manuals?
(If nobody answers, at least this thread is a reference for new newbies like us).

A BMW biker friend & I just picked up matching BMW 525i E39s last month.
We know BMW bikes & web sites for BMW bikes, but, not for these machines.

Calling the local BMW automobile dealership, we found:
$ 185.29 Bentley two-book set (in stock)
$ 15.30 tax
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$ 200.59 total

Searching this web site (BIMMERFEST) we find Bentley is highly regarded.

Googling for price & availability with Bentley E39 as our keyword, we find:
http://www.bentleypublishers.com/bmw/index.htm
$ $169.95 Bentley two-book set (in stock)
$ 6.95 shipping (ground from Massachusetts)
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$ 176.90 total

Searching a bit deeper on the Internet, we find better prices at:
http://www.**************.com
$ 123.90
$ 0.00 shipping
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$ 123.90 total

Checking the obligatory Amazon & Ebay, we find a mixed blessing:

Amazon (new):
$ 107.07 Bmw 5 Series (E39): Service Manual (2-book set)
$ 6.19 shipping
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$ 113.26 total

Ebay (new):
$ 129.00 Buy it now price
$ 12.00 shipping
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$ 141.00

Again, searching this BIMMERFEST community, we find the above, plus:
Bimmerzone ( http://www.bimmerzone.com/bentleymanualsmain.htm ):
$ 106.95 Bentley BMW Service Manual (E39) 5 Series 1997-2002
$ 0.00 Shipping
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$ 106.95 total

Then, in this BIMMERFEST web site, we find multiple mention of a GB.

Is there still a group buy going on for E39 BMW shop manuals?
If there is, what is the price & availability for the E39 GB?
If not, do you recommend a better place than those already mentioned?

Shaftdrive