mean machine for grandmas growing old disgracefully.Glasgow-based owner Ed Rennoc was gutted after forking out £75 for new batteries to get the buggy running again only to get no interest.So he posted a tongue-in-cheek ad on Gumtree on how it could be the perfect gift to make one lucky hell-raising owner the envy of her pals.“It will be like she is 40 again, scooting doon the street peeping her horn at awe the handsome men coming oot the bowling club," reads the ad.“And showing aff tae the other