That's even more of an indicator that it's a scam. You put a listing for something big/bulky/expensive on the internet and some person sees a couple pictures, thinks "good enough" and immediately wants to wire you hundreds of dollars? Without actually seeing it or making sure they aren't getting scammed? Nope, does not happen.
This is common. I've done it myself and had no problems. I want to buy some bulky item from another part of the country, I trust the seller, so I just wire them the money and tell them when my movers are going to show up.
