I´m running a website with used/secondhand boat in Scandinavien.

I´m starting a section where the sellers can choose to show that they might
be interested in taking fx. a bigger boat or a sportscar or an apartement
or...... as part of the sale.

But what do you call that in english?

Exchange with a bigger boat... ?? or whats the words for it ?

Thanks in advance -

Per Krabbe / Denmark