fire emblem hype effect. It will take a year or two after release but the price will go back to the typical 40-70 range with time. Ignoring the very rare nice prices that occasionally pop up on here and ebay. Still jelly that people managed to get sub 20 copies right after I managed to find mine for 45. then I found radiant dawn a little later for around the same price. Of course I was price checking those and stalking the pages like crazy.
The going price for a mint, complete copy has been in the $75-$95 range for at least a year now, excluding amazing local finds and price glitches. The lowest I've seen it in the past year was $75 in a retro facebook page. That copy sold within minutes.
Radiant Dawn, the Wii version, is cheaper. Usually in the $50-$70 range.