I know we're all cheap but $40 and you'll get one. Good luck sir. I just got my 3DS for $120 (it was $112 but tax) and I'm loving it. Got Super Mario 3D Land, Kingdom Hearts 3D, and Legend of Zelda: OoT (all for about $40 from deals).
Seriously, just get it when it eventually drops to $80. I've seen the purple and red 3DS go down to $80 too within the last month and than go back to $90 - $110.
It's definitely worth the money at those prices. It's not like the Vita that doesn't have much games out or coming. (not saying it doesn't have good games but there are reasons why I sold mine even though I got it at launch).