How many tractors are we talking about?  six or sixty?  That factor will affect what option for liquidation is best.

How big of a hurry are you in to get everything gone?

How much work and effort do you or your family want to put into this process?

How much knowledge do you have about these tractor?  I'm guessing little to none based on your post.

Do you want to make top dollar, or just want everything gone?

Location is also a factor.

Is it strictly tractors, or are there other things to get rid of?  Implements, other farm things, etc...

I find it interesting how many people do not think about all of these factors before jumping right to the auction or craigslist or FB replys.  There are advantages and disadvantages to all of these options.  We need to know more before informed suggestions are given.

 However I've become fond of using the online auctions to sell & buy. Find 1 or 2 doing them in the area the farm is in and discuss with them how to get items arranged and listed. For a fee they may have persons willing to come sort items and get them out of sheds so they can be seen & photographed. I'd consider making a fence or gated boundary to prevent lookers from driving among equipment & buildings, leave a space that allows people to walk through to look at larger things. You'll need someone with skid loader, tractor w/loader or an end loader to help load after the sale no matter how you do it. Usually a neighbor with such equipment can be hired to do loading for a few days. 

 Here in the midwest we have several online auctions that cover large areas. They post items from several states. Look for Auctioneers that are connected to list items online or at least in an area of 150 miles from the farm. please post on here when you have a list or Auction Bill. .. .. .. .. 2 online auctions in our area are; 

a. AuctionTime. 

b. Big Iron. 

Also once the word gets out around the neighbor hood  that people are in and out hauling things away , and there's no one around to watch the place ,things could start to disappear . That even  happens where people are living .  Thief's watch everything going  on that's how they blend in and take stuff.  

Good grief! The man has chit everywhere!! Yeah, I would say auction as well. Lots n' lots of good parts there for AC folks. Some of the implements are probably scrap along with some of the wheels and stuff laying around in the dirt.  Man, there's a career move there cleaning up that property!  LOL!

Steve@B&B

Wow that’s a lot of stuff.

Scrappers intelligence varies a lot! Anywhere from hardly any to really quite bright. Anyone that would rather get $5 sending something to China than $50 selling to someone with cash in hand..... I've talked to some of those guys, always leave me scratching my head.

Have also bought several things from guys on the other end of the spectrum. Got an IH suitcase weight angle iron from one once. Asked him how much, oh, couple bucks. All I had was a five, said keep it. Really nice guy.