Where to buy big sturdy racks

[cdoerbec at cso.fmr.com (Christoph Doerbeck a242369)]

Greetings,
and sorry for the off-topic topic!

I want to buy some large sturdy metal racks (with ply-wood shelves likely)
for my garage.  Something better than low end gorilla stuff at homedepot 
and needs to scale up about 15 feet. Someone once mentioned that business
liquidation ebays ... I mean auctions ... were a good source but I don't
know were to look.

Any help for a fellow American who's down on his luck?

Thanks...

-christoph