You are in what I call a virgin area. These shops have never been hit by a razor fan. I'll guarantee you that they have had all of those razors for years and now that you have cleaned them out they will most likely never have another, or if they do it won't be nice ones. You have just taught them that safety razors now have value. They will pop out to eBay to check them out. From this point on they will list anything they find, if they find anything, on eBay.
That pretty much sums it up....I cleaned out my area of metro Atlanta 2 years ago and it's been slim pickin's ever since....