Your PM is not enabled, so I'm posting a message.
Last summer I bought a Summerlite (long) and I'm very happy with it. So in general I'm not interested to sell it.
Nevertheless I might consider it. My wife has a Versalite and both our bags have a right zipper. In order to zip them together one of us would need to switch to a left zipper. I paid $360.52 ($330 + 9.25% sales tax) for my bag.
PM me with a reasonable offer, so I can think about whether it is worth it for me to sell it and buy the left-zip version.