@Macrocentra, If you did not live in Canada... I recently sold this plant
for $35. I have the REALLY SILVER variety, its not the dull gunmetal grey that a lot of them are.
And I know what you are talking about and it IS very disappointing.
I have been looking for an Anthurium scherzianum (the pigtail anthurium) like, forever. I used to have one, unfortunately I lost it, I wanted to replace it. But have not been able to find one, and when I do, so expensive I say no.
Recently on another forum, there was a lady who posted that she was at a garden center and they had a whole table full of them...not only the straight species but some of the great hybrids that exist as well...they were like $15!
Most of the comments were like, man I wish I lived there! Or I hope this will come to my center etc but ONE GUY posted 'YOU SHOULD BUY THEM ALL UP AND RESELL THEM AT A HUGE PROFIT'.
I hate people like that, sorry, hate is not a nice word but you are right, they ruin it for everyone.
When I sell I try as much as possible to make my prices reasonable. If its something exceptionally rare, then I still try to make it reasonable, OR I ask interested people if they would rather trade. Because I am all about increasing my own collection on the cheap so to speak.