You might just wanna visit a store instead of ordering online so you can ask more question regarding this Antminer. I'm not a miner myself and so if ever i would buy one, it would be best for me to really talk to the guy in-charge who has the product knowledge. Can a single Antminier S7 be use for home miner?
I don't think there are coupons currently available... The only offers I've seen are by scammers. Be careful.
I've read the thread earlier, the OP must have receive a PM from them already asking them to go first as usual.