This is the easy part, hard part is getting one of the tool companies or dealers to offer us stuff. Seems like they are making amazing money or they don't care about this forum?
Most car forums work like this, the item is listed and the seller says if 10 ppl buy the price is $** if 15 $** if 20 $**. The more ppl the more reasonable the tool cost.
So the real question is, who's first to step up and offer the great members here a deal?
I have seen a lot of members from forums contact manufactures and offer them a volume purchase, then offer that to the members of the forum.
It can happen a lot of ways, but still need a answer why it's not happening here?
Tools aren't model-specific items that have a lot of markup in order to compensate for the small scale of their production.
If I sell, say, a set of coil-overs for a Subaru, or some nice Wilburs shocks for a BMW motorcycle, then my target group of consumers is pretty limited. I'm going to be selling my product to enthusiasts who own that specific vehicle, and that target group is going to be heavily concentrated on whatever Internet forum caters to that vehicle -- and I can be worth my while to offer a big discount when so much of my business is concentrated in one place. In addition, I can probably expect to get a relatively high rate of return on my investment in the form of repeat business, not to mention the reputation of an enthusiast-friendly business who goes out of the way for customers.
But if I sell tools, well ... anybody who wrenches on any kind of vehicle, equipment, or machinery is going to be a possible customer. The possible consumer base for that product is going to be pretty broad, and won't necessarily be concentrated on any particular website -- especially if the website isn't geared specifically towards professionals. Selling tools at a discount to "members" of a particular website may also violate sales agreements regarding territory or price, because of the nature of truck tool sales franchises.
Let's not make it sound like the folks that *are* here selling tools don't "care" about this place. Given the potential for problems, not to mention the low potential for ROI for giving deep discounts to Joe Blow on the Internet, I just don't think that what you're talking about is feasible or worthwhile for tool manufacturers.