diff --git a/doc/fixes36.2 b/doc/fixes36.2
index ffc70c885..d4fb99cec 100644
--- a/doc/fixes36.2
+++ b/doc/fixes36.2
@@ -312,8 +312,11 @@ looking into an applied container with ':' showed prices of unpaid items but
 prevent achievement luckstone from merging with other luckstones if kicked or
 	dropped by monster (not applicable for dropped by player; achievement
 	would have been recorded and luckstone reverted to normal if picked up)
-when splitting a stack of gems where internal ID is used to make adjustment to
+when splitting a stack where internal ID is used to make adjustment to
 	shop prices, pick an ID for new stack that yields same prices as old
+when merging a stack where internal ID is used to adjust shop prices, always
+	keep the ID which induces the higher price (only matters when buying
+	from shop, not when selling; doesn't affect items already on bill)
 
 
 Fixes to Post-3.6.1 Problems that Were Exposed Via git Repository
diff --git a/src/shk.c b/src/shk.c
index 1031c1606..ae2e1860a 100644
--- a/src/shk.c
+++ b/src/shk.c
@@ -1,4 +1,4 @@
-/* NetHack 3.6	shk.c	$NHDT-Date: 1545951668 2018/12/27 23:01:08 $  $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.149 $ */
+/* NetHack 3.6	shk.c	$NHDT-Date: 1545953813 2018/12/27 23:36:53 $  $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.150 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /*-Copyright (c) Robert Patrick Rankin, 2012. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -958,6 +958,17 @@ register struct obj *obj, *merge;
             *bp = ESHK(shkp)->bill_p[ESHK(shkp)->billct];
 #endif
         }
+    } else {
+        /* not on bill; if the item is being merged away rather than
+           just deleted and has a higher price adjustment than the stack
+           being merged into, give the latter the former's obj->o_id so
+           that the merged stack takes on higher price; matters if hero
+           eventually buys them from a shop, but doesn't matter if hero
+           owns them and intends to sell (unless he subsequently buys
+           them back) or if no shopping activity ever involves them */
+        if (merge && (oid_price_adjustment(obj, obj->o_id)
+                      > oid_price_adjustment(merge, merge->o_id)))
+            merge->o_id = obj->o_id;
     }
     if (obj->owornmask) {
         impossible("obfree: deleting worn obj (%d: %ld)", obj->otyp,