Congratulations on the move!
It’s definitely unlikely that you’ll be able to score any gear more affordably there than you can here. Not to encourage GAS, but whatever. (Though, I scored a Blofeld keyboard relatively cheap, the only deal that was on the local Craigslist equivalent. But Casios were $$$.)
At my worst moment of international geardom, I flew international with a ukulele, three volcas, a Reface DX, a Waldorf Blofeld, and a mid-eastern instrument, all of which entered airports, passed security, and which I had no issues with.
(Also, it all passed through the undercarriage of a 13 hour bus ride, and a nice metro trip too… In retrospect, those were some wild decisions.)
The only thing to worry about with carry-on gear is to make sure that you can demonstrate that everything turns on for security folks. I had a laptop confiscated by security when I was changing flights in Paris because my charger broke and the battery no longer held a charge, and it took daily phonecalls to French airline customer service in order to get someone to locate it and ship it to me at my expense.
Don’t be me! Order power cables to the origin and not your destination. (The replacement laptop charger that awaited me when I reached home was salt in the wound!)
(For lack of advance planning and thought, the Waldorf ended up getting checked under the plane in a soft case wrapped in a quilt. One key was damaged, otherwise it’s in perfect shape.)