It's a cruel world out there. Be safe. How else are we supposed to buy and sell parts. It's a leap of faith, but some precaussions can be taken.
1. Tell him you have a friend in the area that can stop by and pick this up.
2. Ask about a shipping estimate. Most scammers will tel you that they will ship for free.
3. Ask for a photo of a certain angle or to hold up a piece of paper with todays date on it.
4. Ask to pay with CC or Paypal or mail him a money order. Most scammers want Vendmo or Bitcoin or some sort of gift card.
5. Sometime you can Google search the item and find the exact same photo on another site. The scammer took your WTB ad and Google search for an image of it, that is what he is sending to you, so you should be able to find it as well.
You exercised good common sense by coming here for support. Your spider senses were tingling. Only the greedy fall for too good to be true deals.
Report back what happens.