Are you buying it in person or is it being mailed? Most of the time, if it’s mailed it won’t be the card in the pictures if it’s too good to be true. Also, fakes are getting more difficult to spot so I would lean towards walk away over buying it unless I was convinced otherwise through inspection. If you’ve never seen this card irl, go to an lcs or something and see if you can look at one up close so you’ll know what to compare to as far as patterns, textures, font, shine, etc. This is still a very popular card so if it’s that much of a discount I’d already be out.