UBB.threads PHP Forum Software Community Forums General Off Topic Sell vBulletin license? (Trade your UBB license with my vBulletin license?)

Hi folks, badly enought I bought a vBulletin license, because I thought UBB Central was so damn expensive. But now I wanna sell it, I rather want this software.

Do you have any tips how I can sell my license the easiest way, OR, maybe some UBB Threads member wanna try his UBB Threads license with my vBulletin license?