Yes, it is so close to 7 that describing it as 6 is dishonest (we are not talking about 6.50 or 6.51). The brain is lazy and doesn't process it as 7 whereas the relevant part (7) is left out to deceive the customer into buying the product (marketing trick is probably straight out of book of Edward Bernays).

Instead, the product should be good on its own merit; so for me its an orange flag (or rather: proper, informative rounding is a green flag).

We see it elsewhere too. 199 instead of 200. 999 instead of 1000. Etc.