When i shutdown my sites last year I never expected to return. I sold off all the licenses and let the domains expire. When I was given a clean bill of health I kicked myself for selling the licenses and letting the domains expire. I have since rebounded nicely.
Glad to hear.
My main regret is not stocking up on XF forum licenses when they were $120 (I think they had one sale that took them from $140 to $120).
That way, I'd be in the 11+ license category, and purchasing a new one would essentially be inflation-free today at $165.
Still not bad at $175 and still seeking licenses to buy though.
*Hint hint*
But, no, I have never sold a forum license.
I still have my vB 4.2.5 (the latest I can download) with blogs & CMS license. I used that on the very first forum I made and took a huge L on it.
I dropped $10,000~ on my vB4 forum in order to get into a highly competitive niche with $20-30 CPC keywords (including the domain purchase which was quite large for exact match which mattered at that time, vB SEO, a ton of Dragon-Byte brand-free add-ons, and paid content writing). I was lucky enough to recoup 30-50% of my initial investment from ads and a paid sponsor. Still an L.
That's why my #1 advice to anyone starting a forum now is to only do it in a niche that you can create content for. The forum I made was for forex, and at that time, I didn't even know how to trade stocks (I mean with technical analysis and reading financials, I was always adding to my portfolio). The $20+ clicks looked too juicy to turn down and I was already doing quite well with criminal justice (but blogs) at $3-7, so I figured I'd step my game up.