Those ASIC usb block eruptors are seriously overpriced, and I don't understand how they can be profitable. I was lucky enough to purchase 25 (3 separate orders on ebay) before the BTC went over a grand at 10 bucks per, and I thought it was overpriced then. They are no longer in production so I think you might have a hard time finding anymore at a decent price. Might want to look into the Furys usb but again, they are seriously overpriced on ebay. Before the BTC rise I was pricing them at 130 per. The only place that I've found any ASIC hardware at a fair and reasonable price is from asic-technologies.com/asictech.info. The only downside is you have to pay by BTC and you can thank the scammers for that one.