Of course everyone votes for $1.50. You deserve WAY more than that though! People: don't vote based on the cheapest option or what you personally can afford. Vote based on how much you think the art and designs are worth.
It really depends on your market plus supply and demand. I would say 1000 points is pesant pay in an artist's world as there is no way you would take >$10 for a piece of art you probably spent 5 hours on. Pixel art is the thing artists do now so supply is high however demand is high. unfortunately demand is mostly cheapskate low-ballers. Do 500-600 points or get a paypal and charge $15-$20 per piece and prioritise it! Good luck.