I would guess at mid $xx as its not really pronouncable and I cant think of anything you could use it as abbreviations for.
If you are so knowlegable, why ask for opinions in the first place, there is no need to be rude? try Estibot or getting a professional appraisal.
less than reg fee but you can gain more if you develop it and add good content to it. Drive traffic to it and add google adsense or ppc.
i dont understand the less then reg fee estimates this is a llll.com name for sure it got value low-mid $xx IMO
Only because 4 Letter domains are becoming rare is this worth what others have been saying - low to mid $xx... and it is simply because it is not pronounceable, extremely difficult to use as an acronym and doesn't have a lot of branding potential because even to say it as four letters Q A Q F isn't easy and doesn't have that roll-off-the-tongue feeling.