amazon and others show you what they want YOU to see, and believe me, so many of us are overpaying...
Example#1: I was shopping on AMZN for turbotax home (because Intuit crippled Deluxe). price was $79 one day, then $80.84 once I "searched" twice for the same term-I guess they thought that I am hooked..I skipped. Same day from another computer-$48. Amazon is trying to make you pay extra ALL the time and they have lots of tools.
example#2: Every freaking time in the years past when I tried to buy an airplane ticket, in the last minute expedia tried to say that they misteriously run out of this specific ticket/price-would you like to pay $10 more. I ALWAYS canceled their "enhanced" ticket in such cases, so they ask less recently, but someone is either too gullable or don't care-so they continue.
As you said, worst case is you can cancel or return purchases, that isn't available with BTC and instead we have to depend on equitable policy on the part of the vendor. I'm having a hard time recognizing that with Bitmain.
What main street do you shop on? Because I gotta agree with the guy what with the gas station example, that's not how it works literally everywhere I shop.
When you bought at $419, did you buy knowing you'd need the additional $50 in hardware? I know it's pretty much pointless to argue on the internet because everyone is always right and always wrong simultaneously, but you gotta admit you did agree to buy them at the list price. It would be mighty friendly of Bitmain to make good to the people that bought at the exhorbitant price instead of the slightly less exhorbitant price, and apparently they feel they're doing so by offering coupons. That's technically more than they're required to do. The only thing they're required to do is ship you the stuff you ordered.
And remember the first rule of bitcoin - only invest money you're willing to lose.
Since you're clearly not reading my previous responses, this is the last time I respond to you.
1) The gas station example dealt specifically with a sale -- your echo is invalid.
2) I said I own four (including the two ordered), clearly I know about the additional $50, I've done this before.
3) Mainstreet is mainstreet and Bitmain clearly isn't it. Nor is BTC it from appearances.
4) That rule remark is another misstatement. It regards investment, not goods.
Goodbye!