Can anyone tell me why so many trade advertisers omit prices of cars they are offering for sale?

When I seek a second-hand (not ‘pre-owned’, please) car I ignore advertisements which give every possibly detail of the vehicle yet withhold any price indication. The only possible explanation I can think of is that the dealer hopes to get some idea of the gullibility of the punter who rings up to ask the price, which is set there and then.

Perhaps one of the advertisers who have suffered from my boycott may care to comment?

Peter Taylor, Compton Dundon, Somerset.