Used. Factory Stock OEM gear shift knob for P2 Volvo V70 XC70 2001-2007 and some S60 and S80 and maybe others like XC90.
There's small differences between some models and years, so it can be difficult to know the exact one you need without looking at it.
A couple different styles as pictured. May have more or slightly different ones when you read this. Wood-finish versions, no regular plastic-looking versions. $45 for one. Also may have one or two with more wear/scratches on them for cheaper if you don't mind scratches or just want one for the button and rod mechanism.