[Frodo]

For me, HTF sticks like Opus X are different from say - Boris. Older out of production sticks should charge what the market will bear but I won't be buying them. I won't begrudge the seller either though.

Sticks with limited availability like Viajes are different. If they are a recent release I would frown on mark-ups close to their release. Of course the seller can do what he/she wants but this does smack of opportunism. Same with Opus Xs.

Something like Casa Fuente is somewhere in the middle for me. Perhaps a modest mark up I would tolerate (10% ish)...