Pretty much everything is open to bargaining, it's just a matter of whether it's worth your time. If you don't bargain, you are automatically allowing the other person to steal your money. You bet I bargained when I bought my house, when I bought my car.

I've seen bargaining even in department stores, a woman haggling down the price of Coach bags in Macy's by offering to buy several at once. She got the discount.

Just like you, I don't like being sold to, but I have no problem bargaining for something that I seek out myself. In Thailand and India I bargained for clothes, for my backpack, for cab fare, for souvenirs. It was not adversarial at all, and often both me and the merchant was having fun, trying to read each other's minds, pushing and retreating, biding our time. In a way it's kind of like dating =)