I didn't miss the word 'sometimes' out, because I didn't specifically quote you did I?
Whilst you have a valid point as to the early days and playlists from the Wheel, do you honestly believe this scene would be where it is today if playlists were restricted to known and easily available tunes such as Motown, Stax and Atlantic etc (as good as they may be)?
Of course rarity does not equate quality, neither does the opposite.
Records usually become rare/expensive due to demand outstripping supply...and shite records will always be shite records, regardless of quantity they were pressed in.
Not being arsey btw...I just get fed up off hearing the 'Rare cus they are shite and never sold' and 'Emperors New Clothes' statements that get bandied about on here so often.....