Looking into completing my WCA collection, just missing these three cubes, I'm up for trading cubes too! Let know of any offers. (If you have a spare cube bag to throw in I'd also be interested in that.
I have a Wushuang M 5x5 that has very good performance comparable to a Valk 5 if you’re interested. I’d be able to give you a good price on it too considering that it’s a bit older.