Jugs of water, an old 2003 Chevy hood, "for sale" signs with targets on them, an old time clock once, pop cans, playing cards, anything laying around that will work.
I get that one quite often. The other thing that clues me in, is when they copy your title (Item, price and location) and put that in the email subject line. Then in the email, they include the CL link to your add.
To ME, having the magazine on your strong side is a dumb place to put it. And to ME, I'd rather pay a pro to install a remote starter. Just saying, it can end up being a can of worms.