This is clearly one guy re-selling AliEx stuff from his house, but the prices are (concerningly?) low. The pics seem legit, taking a long shot that anyone might have bought from this site?
I've had an AR AEG build in progress for a good while now, put a lot in to getting the exact parts needed, had helpful input from a few other peeps, but need just a couple of small markings altered on the lower receiver before it can continue (and hopefully get finished).
Will involve engraving...