Nice name for a quad premium resource site, but the niche is very limited. Can't see much reseller value, but can be valuable once devloped and established.
As has been said here by everyone, it'd make a great domain to dev.
To be completely honest though, I really wouldn't recommend selling it. It's the kind of domain that with a little bit of development + research into the 4 letter market that could make you a nice site getting hundreds of visitors daily and likely alot more money from ads in the long run than any domainer here is going to pay for the name alone, undeveloped.
Had to edit my post upon looking at your sig... I'm very glad you're putting the domain to good use
Other than making it a marketplace for 4-character domains, you could also possibly provide price guides and archives of LLLL and NNNN domain sales (from Sedo, Afternic, TDNAM, etc.)