Joe: Thanks for saying that. Many people just don't have experience with that limitation. Love your set-up, by the way.Remember you have to have shelves. 105lbs battery WILL NOT be supported by 19" ears only, trust me, Joe.
Surplus Sales of Nebraska is a good source for stuff like this. But they are never going to have a deal as good as the one you found locally. Shipping is EXPENSIVE on things like this.
A local college was clearing racks like this out last year, and had about 8 of them. (Not with all the UPS features) They sold the whole lot for $100. I didn't buy them, because I already have plenty.