It sold (rock bottom

It's hard wired for US 120vac, and there's no voltage selector. It's a Metro JTM45 chassis.
I'm thinking I bias it to my wall voltage, ask the buyer what his wall voltage is, then use that tap and let it fly?
Makes me very nervous not being able to verify everything.
I've never shipped anything outside of the US either, any recommendations on shipping to Canada?
I can be in Windsor Ontario in like 30 minutes or less, would it be better to cross the border and ship it from there?
Thanks for any and all input.