I've been using an Evkin bar for a year and it's been fine so far. I definitely keep an eye on it and agree that it must be a little dodgy vs a western brand at 10x the price, but I haven't died yet. I think it juat comes down to your tolerance for risk.

My rule is to only buy parts that have hundreds of sales and a good rating, which Evkin seems to manage. For this or similar parts I'd only buy them from the official store.