Also I think a certain someone might like to know about the Bow of Solars out of the A&E. It's a 100k bow but it does have a +5 Enhancement Bonus so really it's unique costs about 50k. Anyway, every arrow fired from it is a Slaying Arrow prompting a DC 20 Save or Die with each shot.
No, it has a +2 enhancement bonus, making the unique worth a little over +5 (or +91,200). The +5 is its Strength rating. Also, whoever calculated the bloody thing forgot that Large weapons cost twice as much, because it seems to be a 99,200 enchantment on a 900gp base and a masterwork Large mighty (+5 Str) composite longbow doesn't cost 900 gp (it costs either 1,000 or 1,500 gp depending on how weapon size interacts with mighty composite bows).
Nice job finding that, though; I was a bit bemused when I looked at the Solar entry in MM, thinking "and how much is that bow worth when the PCs inevitably loot it?".