This site is not trusted I'm sure because I don't find any good reviews about this site and I never heard this before.
If you are looking for a Asic miner I would recommend you to directly buy miners on manufacturer like bitmain and pangolinminer.
For Mining rigs you can rent from here
https://www.miningrigrentals.com/ or build your own mining rig much better.
I need ASIC miners
Specifically obelisk miners for Sia coin
Unfortunately the Co. Just announced that batch 6 orders has finished
And as you know prices on eBay are crazy
I think I'll just wait for the next batch