LME or DME or all grain - Given the forum, I'm guessing all grain. I know that a 55gallon drum of LME goes for like 600lb at $3-4/lb of DME those would be well $2k/ drum. BUT this is grain. So how much does it weigh - and can you use the malted barley to brew (I think yes, but I'm an extract guy who likes to solve easy math problems) - Unfortunatly they are usually sold by 55lb. Or 2000 lb bags (see briess.com) If my cu inch to gallon conversion is correct, then 9 of those drums woudl be 1 briess bag - so 2000/9=about 220lb. or $.22/lb of grain that seems like a deal to me, but again I don't buy grain.
Of course this might not hold if some of the grain is bad.
Also of note, I went to briess.com and they sell 'mini bulk' bags that are 39"by 48" by 62"tall and list the rough weight as 2000lb - probably verys on the malt type.