Simple Q&A D&D 3.5 (by RAW) XXI

[Andezzar]

Hah, I saw your attempt at swordsaging.

What Khelb_Panthera wrote is generally correct except that Flaming is just like Frost a special ability that costs +1. So the example weapon would cost like a +3 weapon or 18000 gp (bonus²*2000 gp, weapons are more expensive than armors and shields).