leads from google adwords(businesses advertised for the keyword), google local business listing, yelp listing and google search result for the keyword
It's quality over quantity. The obverse is just spamming. That's fine (I guess lol), but you don't ever learn anything from doing that. You're putting all your marbles in one basket. Let's take the 2nd result from the search....
http://waterdamage-scottsdale.info/
You could pitch them WaterDamageScottsdale.com and they probably won't give 2 shits about it. It's a ~2 year old site. Intention of the site is obvious. These shells of a business, aren't worth targeting. Frankly, if the owner of the site in particular, is the own who developed, designed, marketed, it, etc., than don't bother reaching out. They developed it for 1 reason. They don't care about the name. They're more than content running it on auto-pilot. And this is disregarding .info's that your trying to sell a .info.
Selling an inferior extension to an "inferior buyer" = zilch
I've never met, heard about, etc., anyone that's a successful .info seller; that does outreach for em'. Well, let's say the typical run of the mill .info, because there .info's have seen some success, sales, etc., albeit; small. Think of the countless .com's that have incredible value. Now think of all the .info's that do. Not a whole lot. 99 times out 100, the .info you have, is probably worth a whole lot of nothing. There's nothing wrong covering the bases so to speak, but the most successful sellers are the ones who don't have any remorse after sending their outreach email. Meaning, the people they choose to bother, are worth bothering.
Plainly speaking, sites are developed on .info's because there's just nothing left; at least, there was nothing left. Now there's hundreds to fill the void for the business person who can't afford the .com (granted, new g premiums are ridiculous). A .info is still just a .info.
I appreciate the endeavor, but I think your wasting your time marketing out .info's. It's just a bad bet. The public sales speak for themselves. It's not an investment that will be appreciating over time. You'll probably lose money and more importantly time.