comments:
I own that exact grill, same color and all. Weber Genesis II SE-410. It's a no-frills workhorse that has given me zero issues since buying new seven years ago. At first I was bummed the bottom part was completely exposed. But then I realized that a common rust point on older Genesis/Genesis II models was inside the enclosed lower cabinets, and this model shouldn't run into the same issue. So in a way you dodged a bullet. If you need new grates, I literally just swapped on a fresh set of 9mm stainless knockoffs last night. OEM Weber replacement stainless grates are $240. These were $75, and fit fine. In fact they seem a tad thicker and heavier than the originals: https://www.amazon.com/dp/B0F625Z6BX Congrats OP. That's a killer deal on a fantastic gasser!
Aftermarket, like a car part. Not OEM (Original Equipment Manufacturer)...meaning it's a 3rd party that made the part. With some Weber replacement parts, like grates and flavorizer bars, that can be a significant savings for a very similar part. This is the set I bought for my SE-410. Like I said, it's heavy AF, but I haven't checked fitment yet: https://www.amazon.com/dp/B0F625Z6BX