Play asia's dropped the price of the Asian version with English subtitles from $40 USD to $30 USD for this week's sale. If you want a physical English version (Sony Asia is the only place that printed a physical English vita edition) of this game on the vita this is a decent price for it at the moment and possibly best as it's unlikely to show up second hand on ebay or get lower over time as it gets more rare. Shipping is a large 9.37c AUD and thats the slow option with no tracking.
Please note Audio is in japanese as is standard for these games but menu and anywhere text is is in English.
Otherwise if you want the digital version, the Playstation Store sells it for $49.95.