Goodwill Industries review: Price deceptive deception — is it legal in tn

while shopping at the Lebanon tn outlet , one of the items was a pair of deck shoes with a goodwill sticker inside @ $6.99 only to find at the check out it was hiked the price to $8.99 when I complained to a supervisor why they said on the under side in white marker was 8R--- i wonder if in tn this is legal at the least deception -=need less to say i didn't buy them and will never step in that branch again -----i regard this as a fraudulent practice