Auction will charge you a percentage fee,pay you with a check and you will have to report for taxes.cash buyer is money in hand.
you could get a cash buyer or 2 or 3 willing to pay your price or more. They take it all, you get cash in hand, no taxes or fees.
this is a no brainier, sell the key items too individuals for cash then part out the lower end items
don't put the key items in a auction, the key items will sell there self,
eliminate the "taxes & fees" that is where your going too take the biggest hit.. ...