. >> soon after, the family hires auctioneer yvette vanderbrink to handle the sale of their dad's collectionession was, wow, this is really a lot of automotive history. >> yvette immediately puts the family to work. she wants as many of the vehicles as possible up and running by the auction. >> so here we are at the farm. this gives you an idea of what we're up against. >> how much work went into getting them ready for auction? >> it's overwhelming to deal with. you got to get the mechanics up working on 'em, you got to get the detail people to come up. it's a long process. >> despite the challenge, the family brings many back to life. and as the auction nears, the reality of saying goodbye to dad's cars begins to sink in. >> this is a piece of dad. it's very personal to your father. >> yeah. but he always used to say there's time slots in life, right, for different things. and, uh, anyway, this time slot is over, right, so it's time to sell 'em and -- and move on. >> of course there's no telling what grant's unusually rare models might sell for. >> how do you set a price on some of these? >