Is this considered unethical? Every time I want to search google for something, especially if it's something I want to buy, first I find a site that uses adsense for search?
Ehm no, I think it's legimit. Perhaps not nice for the searchers, but I don't think it's against the rules. But you could send Google an email about this though if you're doubting.
Well, it's not like they could really ban me... and I am genuinely interested in what I'm searching for... Plus I don't always use the same site and it's not like I search 80 times a day, so I'm not clickbombing either.
Sorry I'm a bit confused now, are you talking about your own sites or about other sites? If you talk about sites of other webmasters you could report this issue to Google if you think it's not ethical.
Other sites. I don't search on my own site, I'd get banned. I go to another totally unrelated persons site and use their adsense for search so they can get paid.
well if you do that for just generating money 4 that site but have no interest in that product then its unethical but otherwise its fine