Sorry about you loss, i've never really seen an Arowana in the flesh and blood, so they must be rare fish. I hope you get over it soon. I recently have lost many fish, because of ammonia extremes and my ignorance X.x
They usually cost 34 for about 4 inch babies. When they are about 7 inches they usually cost around 70 usa. Asians are usually mor around 100 were i live.
a red arowana usually costs in the thousands cos they are rare, highly prized, and endangered (I believe). There is no way a red arowana can be sold for $30.