OP cited the Sony 18 - 200. The 55 - 210 is their kit telephoto. When I bought the a6000 the store had a special for $125, which was around $100 off.
jerryc41 wrote:
For me, the + was having wide angle (18mm) available. Comparing identical images taken with each lens showed me no differences I could detect. If both lenses spent a week being tested in a lab, I'm sure they'd find differences. There was also a difference in price. The Sony 55-210 from ebay cost $185, while the Tamron 18-200mm (KEH) was $499.