You select your date, time, and locations -- and then you make an offer.
Almost every licensed realtor is qualified to show, sell, and make an offer on a HUD home.
Shoppers can also make an offer on an item if they wish.
There is also a special section called "GeekLine" where you can make an offer on electronics and computer parts and the "first reasonable offer" receives the item.
Before you contact them, be sure you've set a budget for your purchase so you can make an offer.