Probably not unique to bike forums.
But I call it bike forums math.
Mid 70s paramount frameset.
for sale for $550...
Bike forums reasoning for discounts.. First. its a 23 inch frame.. Very undesirable. discount to $400
Bike forums discount! You got to do that. so now its $250
Just having fun.
This actually happened to me here. LOL
I ended up selling it for $500
JJ
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From Illinois. Collector of many fine bicycles from all over the world. Subscribe to my Youtube channel. Just search John's vintage road bike garage