Yeah, it does but HomeShopping doesn't send sealed boxes anyways if that's what you mean since they open the boxes before shipping to check if the phone is faulty or not. I'm okay with paying 500-1000 more and having OxygenOS installed out of the box. I checked with some threads on XDA and there were other reports of A3010 coming preinstalled with OOS too so maybe HomeShopping didn't doanything but there's no way of knowing that.
I had the option of importing the North American variant with 1 year warranty for around 45-46k but didn't because of the LTE bands and because the warranty wasn't going to matter anyways since it was American.
I know the boxes aren't sealed because they're opened by customs etc and by HSN themselves for QC, but I don't know how experienced their 'mobile department' is and I'd rather not have someone fiddling with my phone before I've even received it.
The ones you've read about on XDA with OOS supposedly preinstalled are actually the 3rd party retailers opening boxes, flashing OOS, resetting the devices and closing the boxes and selling them as 'International' variants.
Happens usually where OnePlus doesn't sell officially, like in Pakistan.
In this particular case, I'd definitely save the extra cash and go buy from someone else and flash OOS myself.
Be very careful with HSN, very careful.
And lastly, if you check XDA, there is a long and complicated procedure of enabling the relevant LTE bands on the A3000 US variant, but why go through all that trouble for saving a few thousand rupees?