We Offer:

Proxy Bidders:

Jason Dvorak's Background:

About Dvorak Auction Service:


Greenfield-Dvorak Pro Auctions are the right choice for all your auction, auctioneer, and professional ringmen needs in Iowa.

(Serving Des Moines, Ames, Cedar Rapids, Waterloo, and all the surrounding areas).


With the recent partnership we have a outstanding benefit to offer our clients.  Greenfield Pro Auction Arena is located at 3920 Dixon Street in Des Moines which offers us the opportunity to move your assets to our location which has been attended by regular buyers for over 40 years, or hold an auction at your site stilling bringing with us the power of the loyal following we've developed.


We offer full auction marketing services for:



Business liquidation


Industrial Equipment



Farm Machinery


Farm Toys



Construction Equipment


Real Estate


Our company offers fully computerize clerking and cashiering services as well to ensure you get an accurate accounting of your auction sale at settlement.  This also speeds the sale process making it move along much quicker and a much more enjoyable experience for buyers.


Our company has the ability to transport estates from all across the state of Iowa in our box vans specially equiped for moving large number of items safely to our location.  Often times it can be well worth the money spent to move the estate to Des Moines for sale where we can assemble a larger crowd to bid on the items.


To contact us about our auction services and helping you sell your assets please call us at:


or at the Greenfield Auction Arena at 515-265-2429

or email Dvorak71@gmail.com

If you are unable to attend an auction in person for any reason we can accept your bid online.  Your bid will be accepted along with everyother bidder.  If you are the winner of that item you will be contacted via email or telephone to discuss payment and shipping or pickup.

To place a proxy bid please email Dvorak Auction Service at: gdproiowa@gmail.com

Please include in your email:

The date of auction


Max bid


Must be 18 or older to place bid

  • Born and raised in Eastern Iowa on a farm

  • Eagle Scout

  • Graduate of Benton Community

  • Graduate of Drake University

  • Graduate of World Wide College of Auctioneering

  • Graduate of (PRI)-Professional Ringmen's Institute

  • Married for 9 years, to wife Helen

  • They have 3 daughters

​Jason Dvorak is a 2003 Graduate of Drake University, with a degree in Business Management, and a graduate of World Wide College of Auctioneering in Mason City, Iowa.


Jason is a Graduate of Professional Ringmen's Institue (PRI) in Springfield, Missouri.

Dvorak Auction Service can help you in every aspect of an auction.  We pride ourselves on integrity, dedication, and hardwork.  We will do everything possible to make your auction a success. With the proper training as an Auctioneer and proper Professional Ringman Training Dvorak Auction Service is the right choice! 

We offer all types of Auctions and Services :

  • Estate Auctions

  • Antique Auctions

  • Household Auctions

  • Farm Machinery Auctions

  • Business Liquidation Auctions

  • Benefit Auctions

  • Storage Auctions

  • Farm Toy Auctions

  • Bankruptcy

  • Coin Auctions

  • Any General Auctions

  • Contract PROFESSIONAL RINGMAN Services



Dvorak Auction Service


Greenfield Auction Arena





Greenfield Auction Arena:


3920 Dixon St

Des Moines, IA 50313

© 2012 by Dvorak Auction Service