if you really want to test it - you can start a campaign with 2-3 dollars/day budget and see what's going on. Use composed keywords (using KW suggestion tool is really helpful). Results depend a lot of site's profile.
Also, remember to target (ideally) specific pages on your site, directly related to you ad content.'
It can be a good idea to create landing pages. Try to imagine, once you create the ad, what the user expect to find when clickig on that specific ad.