I have a Dasqua digital 6″ caliper which cost about £35 and it compares well against my Mitutoyo’s and my Tesa at a much more affordable price. I have also bought one of their 8″ digital height gauges and recently one of their magnetic DTI stands for a Baty lever mechanical indicator. They all came from RDG which I have dealt with for years and trust. Chronos is also a good firm to deal with. Sad to say, my 6″ Mitutoyo digital calipers bought in 1989 are no longer reliable electrically and have had to be pensioned off.
As for the description ” digital vernier”, the seller is probably playing to the dumb end of the market who don’t know what a vernier is, but associate it with this type of instrument. I have two Mitutoyo parallex free vernier calipers, one 6″ and the other 5″, not listed any more.