You could show a tad of paitence you know. But alas, my answer will still be respectful
If they are BNIB, how does the seller know they have cycling issues? Further still, a "cycling issue" can range from a dry/flat o-ring on the bolt - anything inbetween - to having to rebuild/replace the solenoid. A "cycling issue" is the vaguest term I think you could use...since any problem with a marker which operates in this manner will likely have difficulty cycling.
Anyway, I was talking to Chris the other day, and brought something up about a non-transferrable warrenty. Completely disregard this if you have the blank warrenty card or have it filled out in your name, or just not mention it at all - so yes, it should still be covered.
As for cost of repair, the simple o-ring I mentioned would be free....or no more than all of 60 cents. The solenoid is a base $65 and requires the gun to be sent in, unless you wish to do the disassembly, soldering, and connection yourself. Also, the warrenty only guarentees that W/M will fix the gun, however, unless it can be proved with physical evidence, not hearsay that it was BNIB and never used, will W/M fix it for free. Basically, it's only free if it was W/M's fault.