How much is the financing fee or how long do they give you before they charge interest? If the financing isnt free or is high, then I would just stick with the korg and save for a another board.
Bruh, she said she only wants to spend around $600.
An XP10 should be no more than 200. XP80 -around 550-700. XP 30 and 50 should be in between, at like 400. I'm not sure if there is a 60, but I 'd try to get the best one you can afford. (higher number = newer)
I have an XP-10, i dont think i'd recomend it for you. The only thing I use it for is piano sound, the electric pianos and rhodes dont sound too good. The newer ones have better sounds and a lot more features.
If you do do decide to buy used, make sure you test it out for a few minutes and that everything works properly.