This is just an example of supply and demand. I'll bet Yamaha sold 5-10 2020's for every 3020 every sold. The 3020 is a rare bird. They don't come available often.
The 2020/1020 are great. It is more than enough for anyone if you want a great receiver but the 3020 is unique and the low production numbers and the limited availablity of 3020 put it in a different class.
Should a 3020 should be worth three times as much as a 2020 of equivelant condition?
Oh yeah........ If I really wanted one and I had to pay a few hundred extra to get one that is in great shape?
Yup!!
I'd brown bag my lunch for three months to pay the difference between a 3020 and a 2020.
Screw the electric bill. I'll turn down the heat whil I'm listening. Let the heat sinks warm up the room!
It's a bit fun to brag about the price you paid when you get a good deal but if I really want a paticular piece you don't see very often in super condition, you will have to pay a hefty premium. The cabinet on this 3020 could be freshened up with $20 in materials.
Some quick examples:
Yamaha NS690 NS1000 speakers vs NS2000
Yamaha PX2 PX3
Yamaha CA 810 vs CA1010 or CA2010
Personally, I think the 3020 is as good as and probably better than any of the other monster receivers out there.
The TOTL product in any manufacturers product line is almost always at least 2X the price of the 2nd from TOTL..
Remember the immortal words of Will Farrell in the movie that should have swept the Academy awards "Talledega Nights"
"Second is last"
P.S. The ladies all tell me size matters.