diff --git a/doc/orbic.md b/doc/orbic.md
index 1b1a7ca..4bdb089 100644
--- a/doc/orbic.md
+++ b/doc/orbic.md
@@ -6,7 +6,8 @@ It is also sometimes sold under the brand Kajeet RC400L. This is the exact same
 
 You can buy an Orbic [using bezos
 bucks](https://www.amazon.com/Orbic-Verizon-Hotspot-Connect-Enabled/dp/B08N3CHC4Y),
-or on [eBay](https://www.ebay.com/sch/i.html?_nkw=orbic+rc400l).
+or on [eBay](https://www.ebay.com/sch/i.html?_nkw=orbic+rc400l). You should not
+pay more than 30 USD for such a device (without shipping).
 
 [Please check whether the Orbic works in your country](https://www.frequencycheck.com/countries/), and whether the Orbic RC400L supports the right frequency bands for your purpose before buying.