Larry Brown wrote, "It'd probably bring even more if it were a SG/BT gun."
Did you hear it? Don Zutz just rolled over in his grave. "Did you hear it" is a reference to Zuts' belief that PG should paired with BT and SG belongs with splinters.
I have not stopped shooting the 28, I'm more aware of its value and therefore baby the little gun. I have 3 BSS', two in 20 gauge and one 12 gauge and they have escalated in value. All three guns are SG with sem-BT' and the 20' have upgraded wood, one of which has a highly figured Claro walnut. I use the 12 gauge for waterfowl and pretty much use the 20' for rough country Chukkar. My go to gun is an AYA 16 gauge #2 that is fed all brass hulls.

Jim