Drowning in Parts~~Need advice

OK...Not even real sure where to start here. A few years back I purchased a machine shop business from a retiring gentleman in CA. He had a very lucrative business and was very successful for many years. I was mainly after his equipment, having a machine shop of my own, but the way the deal worked out, I BOUGHT EVERYTHING inside the building. This included hundreds/thousands of gaskets, valves, springs, you name it I'm pretty sure I have one. Gaskets for everything from a 1979 Nissan/Datsun or a 1985 Toyota Camry, or a Pontiac 400 Muscle Car to a Forklift. Head gaskets to Full Engine Gasket sets.
To give you a mental picture, after giving half of the stuff to a friend of the family I STILL have a Tractor Trailer completely stuffed from top to bottom of this stuff!! Short of listing each individual item on ebay (which would take YEARS btw) What would be another way? Like who could I call to sell ALL the gaskets to for like 1/4 of what they are worth? I really need to get rid of this stuff IN BULK if possible and have no clue where to start. Any suggestions greatly appreciated......