You can check out the domain forums here, at sitepoint, at namepros, and at dnforum for help. But as above, I think they're a bit long, unless someone was specifically targeting those keywords. By contrast, for example, I own seoroi.com, viralsem.com and others... short. But i'm a newb too, so take my opinion with a grain of salt.
I will offer $10 each... Seriously, not much value, at all, unless they have some good age on them...
Rather than set a price for them... see what they offer first. Who knows they might have deep pockets. But I would think probably a few hundred bucks for the lot... but you never know...
Speaking of Good Age Caydel... what exactly is good age for a domain... Should it be populated during that time... even with a under construction page... or is it the duration of time that the domain was registered for (even if it redirected to another page)... Always curious here what people think... I really don't know.
I wouldn't pay above registration costs for a domain which has less than 2 years. If it has been parked or with just a single landing page for it's entire life span, 3 or 4 years... That's just my $0.02
If someone is asking to buy them then they have more value. If they have inquired to buy them, then they must be interested in the keyword value. Those are great search terms for that market. they are worth far more than registration costs. But $1100 may be too high. Perhaps half that. Ask $600 and see how they respond. But content writing is not my market so i have no idea, really. But $200 for a keyword domain aint bad. They are not too long for someone using them to target those terms, they are perfect. A few such sites targeting those types of search phrases, all linking (with sales copy) to the main site with the good short brandable domain. Perfect.
Agree with Axemedia... Also make sure it's seen as a step in negotiations. Give a range and ask what they are interested in investing. For commercial/moneymaking purposes, (versus personal ones) you can ask more.
I would take it if I were you. You barely have SE penetration with your domains. Yeah they are keyword rich, if you want more out of them then let them age a bit and make them popular (high SE penetration or a wanted site (forum, excellent articles, etc)).
too long domains, should ba valued low xxx all 3 at the max or lower, then depends on the domain age..
$800 is GOOD! take it. And to those who keep posting "domain too long", come on, give it some thought first before you just spit out what we all know is usually a guideline that, for very obvious reasons, does not apply here. Nor does age matter. The person who offered $800 knows what they are good for.