Made in 2022. Used for about a year and a half. I don't think there are any noticeable stains. It's convenient with oven and grill functions! The only included accessory is the baking sheet. The instruction manual is not included, so I've attached the official PDF link. https://jp.sharp/restricted/support/manual/oven/resfe2_mn.pdf I want to sell it quickly, so please feel free to offer your desired price!