Selling up is sad news, but guess you have a decision to make.

Depends how motivated you are to get the absolute best price. Probably here is as good as anywhere. Selling through commercial outlets is probably easy but won't bring the most $ and breaking up into small lots on ebay probably has potential for highest return but is hassle. If its good kit, as I'm sure it is, and money isn't the prime motivator, why not contact the local colleges where photog courses are held and see if you can advertise there. I always think selling kit to someone you know is going to use it has more satisfaction.

All the best, Simon