"Call for price"

It's either bait and switch, ridiculous high price, or the opportunity to start a high pressure pitch.

All three are to be avoided by the reasonably intelligent.

Generally, in a market economy, the burden of setting a price falls on the selling party.

Some sellers mistakenly believe requiring a potential buyer to inquire about pricing or requiring them to make an offer weeds out "lookers", but in reality actually weeds out a LOT of potential actual buyers, and as illustrated above sets up a ridiculous lowball offer scenario.