I own 4 Tasco World Class scopes (1-3.5X, 1.75-5X, 2-7X, and a 3-9X) and two other Tasco scopes that are the 2-8X compact model, not sure if they are "World Class" but I don't think so.
I purchased all of these scope from 10 -15 years ago. Never had a problem with any of them. In fact one of the 2-8X scopes is on a muzzleloader barrel that I routinely dunk in a bucket of hot water to clean, the scope has never leaked or fogged on me. I paid about $100 for each of the World Class scopes when they were new and I believe I paid about $70 for the compact models when they went on sale. I noticed over the years the Tasco scopes came way down in price, I've always wondered if the quality came down as well.
Greg