Yes, provided that they have the money.
This is still a free Country, so I can't see why such a prohibition would benefit anyone.
Who do you believe would be the aggrieved parties ?
Some State jurisdictions may mandate that disclosure be made . . . . but really, who's going to be paying attention, The Auctioneer ?
Dale C. Hittle of GOLDEN RULE PROPERTIES in Glover, Vermont
Where We're Always Striving To Put Together "THE FAIR DEAL"