Dear vlad_greize,
Most of the sellers are unfamiliar what they selling, especially when they’re technical products for sale. Most affordable products coming from China and this is the Bermuda triangle for us buyers. My recent experience was a mini saw table and the rating was very high(probably the manufacturing company did that) and there is nothing to do with the seller. OK I left bad feedback, but the product rating remain the same and someone else will fall in the product rating trap and some other seller will get bad feedback!