This is a tough time of year to do a deal in the audio biz. Some sellers are industry participants that could be working for manufacturers, distributors, or dealers. They could've be out on vacation around Christmas and New Years and out to Vegas for the big CES show. Also, while I haven't had any non-responses to ad correspondence on Audiogon, I'm sure they must occur from time to time, and you may just have had a bad statistical run. Finally, it may be that some sellers don't notify Audiogon promptly when their offering is sold or a sale is pending. Of course, they should let you know if the product is spoken for, but they would not be motivated to respond as much as if there were still a deal to be made.