Some collectors insist on using only Mint postcards for realisation of maximum cards. That is purely individual's preference. I am using both Mint and Used postcards for my maximum cards as long as they are concordant in pictures. In fact, there are old subjects featured on stamps that I find difficulty in looking for mint postcards to realise a good maximum card, the only solution is to look for the Used postcards. I would say, used postcards are equally good as mint postcards for the realisation of maximum cards.
- A maximum card realised with the "greetings" stamps issued in 2009, CDS postmark, Taiwan