That pricing is - insanely high! Avalon for $1,700?? That is 2x the cost direct from Canaan.
Looking at their website: HIGHLY SUSPECT to say the least
Warning! Warning! Danger Will Robinson!
It has high prices, because it is a hardware reseller.
They find hardware, they ship right away. Shipping costs are low.
Then there is the matter of warranty service: Bitmain does NOT have any Authorized resellers. That means - no warranty from them nor will they even consider warranty coverage through said un-authorized reseller. Don't know for sure but I'd guess Canaan is the same regarding their Avalon's.
That said, if some folks decide to buy from you, well, more power to ya.
That will then just leave having proof of product deliveries to customers vs being another take the BTC and run operation.
You are right, the prices are high, but they guarantee the delivery.