Also, not every one lives on the site 24/7 some people take 24 hours to respond, sometimes I've had to wait 2 weeks. Imo, I would give the initial "dibser" time to respond, if he declined based upon the issue with the single chip move on to the back up dibs.
@DZPoker nothing against you at all I dont want to negate your offer, I just felt as though someone should mention there was other interested buyers in line that may have been missed