TCGIndex doesn't give financial advice, but here's the data worth knowing. Prices can move fast, so look at the trend and your own timeframe before you buy. TCGIndex publishes one Yu-Gi-Oh pick every morning; each pick becomes public 14 days later and is scored at day 30.
Other printings of Elemental HERO Bladedge
Elemental HERO Bladedge has 5 other priced printings, from $0.14 to $0.72. Cheapest first.