Once you get the bug, there's no fighting it. That said, with that aged power, that sounds pretty steep to me. It really depends how much they've been run and cared for, but you may be looking at engines or major parts sooner than you think. From a guy running a single i/o, I love the feel and balance of this power, but I'm not sure I would want to deal with the maintenance of two of them. Then again, they could be tuned and cared for beautifully.
I think it's a buyer's market right now and if you are patient you will fine good quality for less money. If you can get a great boat, for say, 15, you could put brand new warranteed power on it for what you have left over for that other 14 and now you're talking.
It is a beautiful boat, though, and who knows, you may already be smitten
Good luck either way.
Let us know what you do. There aren't too many other 23 cc i/o guys that post here too much.
PM me if you have any questions about things to poke around for if you are taking a closer look.
Doug