Air conditioners are sold well in the summer months.
Those two sentences have slightly different meanings. "air conditioners sell (adverb)" describes if they are selling. "air conditioners are sold (adverb)" describes the skills of the person selling them, or the method they are using to do the selling.
With that said, "Air conditioners are sold well in the summer months" does not work. You could say "Air conditioners are sold well by the sales team", although it sounds a little constructed. You would probably want to use a present voice construction. "Our sales team does a great job of selling air conditioners during the summer."
I'm not a fan of Ngrams, so my answer is based on personal opinion and experience.
Although I suppose that the three phrases would be perfectly understood in context, if I were to use one of them I'd go for the first one (I have no clue) or for a modified version of the second (I don't have a clue or I haven't got a clue).
I wouldn't use the second phrase as it is because in negative sentences the verb have is normally used either in conjunction with got, thus being an auxiliary, or preceded by "don't"/"doesn't"/"didn't" as any other verb.
As for clueless, OALD states that it is an informal, disapproving adjective which means "very stupid; not able to understand or do something", which is a deviation from the meaning of the previous sentences.
Yes, "this photo gave me chills" is perfectly fine. "This photo gave me goosebumps" works too. Both phrases would be immediately understood by a native speaker.
Edit: As @WhatRoughBeast pointed out, this phrase can also be used to mean "it frightened me" or "it made me very uneasy".
Best Answer
Those two sentences have slightly different meanings. "air conditioners sell (adverb)" describes if they are selling. "air conditioners are sold (adverb)" describes the skills of the person selling them, or the method they are using to do the selling.
With that said, "Air conditioners are sold well in the summer months" does not work. You could say "Air conditioners are sold well by the sales team", although it sounds a little constructed. You would probably want to use a present voice construction. "Our sales team does a great job of selling air conditioners during the summer."