I think if you are going to do it, you need to ask the vendor to just have a sale to GJ members. It would have to be a vendor that does mail order, and capable of shipping to many addresses. You could most likely get a bigger price break if somebody was willing to have them all shipped to a certain address and then distributed out. Before I did that I would make sure that they were all paid for somehow, because having more than one or two is not needed.
By reading the post many are interested, but the sentence of depends on cost from many, would bother me about going to far out on a limb. I would guess that to get a quality one, the best you would be able to do is get 10-15% off. If they retail at $110, you are still at $90 plus. Add shipping and it looks like many would not want one at that price.
Now if you could reach out to the manufacturer, and bypass a few middle man then you may get a better deal.
I own two, a corded and a rechargeable one. They each have there place, as with any tool. If you work under the hood of a car you should have one.