If You Have to Ask, You Can't Afford It

A condo near my apartment is up for sale, and I was curious about the size and listing price, to see how they compare to mine in NM.  The flyer, though, doesn't list the price.  Instead, it gives a phone number to call and a number to enter.  I suppose it helps give the realtor an idea of how many people might be interested in the property.  It also discourages the merely curious (like me).  What happened to the olden days, when all your nosy neighbors had to do was drive by the sign staked in your front yard?