With such strong demand, i'd really consider holding half your stock until after the movie or raising your prices. I just think demand for these older OT sets are going to be even stronger come December 18th. I'm going to go against the grain on this one a little. Once people are like "holllllyyy cow, that movie was awesome, I MUST BUY THE TOYS for my kids, just like I had as a kid"... then they see all the lego sets that they missed out on, many of which are retired and have the OT stamp, it's more than likely going to only get better. Granted, new falcon vs old falcon, but there's going to be a lot of new AFOLs out there partial to the OT version.
Of course the movie could suck, and the hate machine could be cranking on high, at which point, you might be glad you sold them all now. But, with such a good amount of stock, you don't want to blow them all early.