Same here - look at the baseline. These older paint pens bleed into themselves so the stroke following is hampered if not impossible at times. I would get VERY familiar with any signature I was considering before I spent a dime. Research before purchase is priceless. After, not so good.
If you look at the Macho Tonka Wrestling Buddy in the background that Macho autographed, the signature looks almost identical to the OP. I believe this is authentic too.