I would be careful, I recently sold a night here, two days ago I saw a charge on my CC for $400+. It seems like the person who bought it called in to merge with a different night he bought, and IHG returned my free night and charged the CC I reserved with full price.
Update: After repeatedly emailing the buyer and asking him to call me so we can figure out the details, he emailed, and claimed that he called IHG and they told him it's a mistake and it will be taken care of in a few days, and they would email with update. After a week with no sign of it being resolved in any way I called IHG myself, (without knowing all the details because he refused to call me), they put me on hold and called the hotel. They came back and said the hotel said it was a no-show and that is why they charged me and returned my free night. I said that my additional guest had checked in, so they asked if I had a receipt or check-out paper from the hotel. I said I would look for it and get back to them.
After emailing the buyer again and imploring him to call me, just to get all the facts straight, he finally did call. It turns out he bought three nights and combined, mine was the middle night. He said he would look for a receipt and call to take care of it. Another week has past and still nothing from him. My CC bill is due and I'm just going to pay it and hope he reimburses me, and if not I'll chalk it up as a learning experience.
Lessons learned, to book with a GC with small balance, or VCC with $1 limit. Also to due a little more due diligence on who I sell to.
Sorry for the wall of text, I just wanted to put in details to save some of the follow up questions.