That does not seem like a sound business practice if you want to keep regular customers.
The LCS I have a pull for instituted a 1 per customer limit on 193, except I already had one in my pull so they allowed me to get a 2nd and pulled it for me. Glad they did as the copy I read has some damage to the back corner I wouldn't have noticed otherwise. So I have one as a keeper and one as the reader.
This shop also does not sell back issues, at all, I have no idea what they do after a book gets to a certain age. They deal a bunch in TPBs I know that. And they are not a fan of collectors it seems, they limit normal shelf buys to 2 copies per person.
Also sorry for getting TWD cancelled, since I literally only started the pull for it the day 192 released.......