I purchased Tecna and Bloom (for my sister) a very long time ago, and glad I did. I haven't seen any enchantix Tecna dolls on ebay for the longest time.
My sister wanted the enchantix Musa for Christmas this year, which I knew I wasn't going to be able to get her. The one time I saw an enchantix Musa on ebay, it was used and went for over $30 last time I checked. o_O (Which was not a price I was willing to pay).
Winx merchandise and prices... crazy, just crazy.
By the way, I'd suggest checking ebay for the enchantix Bloom and Flora.
I remember seeing them floating around there every so often. (Most the time, the prices were outrageous, but once in awhile you can find a really good deal.)