New Seller here with question, brand new account sent offer really quickly

Hey new seller here just looking to offload some items from my closet. I just listed an Item (an expensive sweatshirt) and within 20 mins a brand new account (joined less than an hour ago) sent me an offer that is $10 less than my listed price. With how quick it was sent this just seems a little fishy and I haven't accepted the offer just yet. I wanted to reach out and see if there are scammers on here that I need to be aware of that will somehow try and scam me out of this item and or the money? I would assume Depop protects sellers in this example and maybe I am being paranoid for no reason. Just wanted to reach out and ask.

Thank you kindly.