I generally low ball all of these guess appraisals as what someone wants and what another is actually ready to pay usually are not the same.
.info is not a great tld but it has at least stayed in
Spell check is a great word
combine these 2 together and you look at a value
Spell check dot com could go well up to 10k
dot net perhaps 5 k
.org perhaps 1k but thats high
following this type of logic and the popularity of domain extensions I would say mid xxx for this domain with good market, but that is to an enduser
as a resell you need to half that price because thats all you will get in this economy so Id say
high xx to low xxx depending on the day and market conditions