Wow. Have you noticed the HUGE amount of stuff for sale here lately?
the latest wave of scams seem to be the effect of: hey i saw you were looking for [blank], i just bought one of those off [insert known member/person here], then they have a pic they ripped from a forum or an ebay/CL sale and offer you some really good deal.
there's another version of the same play with a whole "my friend" bought [blank] from [known member/person] here's their contact info and again some ripped pic from somewhere.
one way you can suss this out is to ask for an additional picture from a different angle.
another quick trick is google the email, if you're lucky you'll get a hit and can ghost them and block email/number.
be suspect of emails that are odd hosts you've never heard of or are very generic name/number sequences. like "sscott2442@gmail" is more sus than "jsmith1959@yahoo"
if you don't know them, paypal standard and if they won't cover the fees, do so yourself and consider it a small price to pay for insurance if the deal goes sideways. don't venmo or zelle if you don't know the person. if they want a check, send a USPS money order and if they jeep on you that's mail fraud.
if the deal seems too good to be true, it likely is. walk away, there will be another.