How badly do you want an AK, and how badly do you want a perfectly mint one?

You should be able to get a MK1 A4 for around USD$600 or so. AKs seem to sell for $700-$900 in good shape. Mine came with a scratched Page/Scale key, but I suspect I could get a replacement key from Elektron for cheap or free. If not, doesn’t matter much to me.

For $1400 I personally would rather have an AK and an A4mk1 in good condition rather than just a super mint AK. But I also see a bit of wear on a synth as a sign that the synth was actually put to good use rather than sitting in a collector’s closet.

I don’t think we can tell you the right answer, this is really a situation where personal preference and personal finances should show you the way.