Within the past week I’ve noticed that Airguns of Arizona (AOA) now sells used glass. I don't know if this is a first for them, but it's the first time I've noticed it. I haven’t purchased any from them, but if they offer a warranty that is similar to what comes with their used guns it may not be a bad idea to look into their used scopes. I have used the warranty that comes with their used guns and it’s a decent policy that only required me to pay shipping one way. It’s also worth mentioning that some scope manufacturers (e.g. Bushnell or Vortex) offer great lifetime warranties on their products as well and their warranties should cover used scopes. If you're unsure, call and ask. AOA has some of the best customer service I’ve encountered from an online business. They are definitely worth checking out. https://www.airgunsofarizona.com/usedguns.html