Discs Worth Money (Buy to Resell)

I know there are a few discs that are rather coveted. 

I think they are: 

11x TBird

11x Valk

4x Valk Jen

What are some others. I go to several disc shops and would like to know what to stay on the look out for. 

Thanks in Advance. 

[nick young]

Orange z storms my bad.

[Donny Olow]

8x Roc !

[Donny Olow]

Champion Destroyer 1st Run !!!

[Ryan Rios]

Innova dolphin;)
funny but I'm being serious

[Reid F.]

are CE KC 9x eagles worth anything?

[Discette]

No such thing as an 11X Valkyrie. The Champion Valkyrie was a signature disc for Juliana Korver - a 5x World Champion.

[Donny Olow]

Innova Griffin !

[Donny Olow]

These are what some are looking for , including me !!!

[Jamie 'gr8rocshot' Ruane]

I bet that 11X valk is worth some bucks......huh? Juliana better get busy..she's got some catch'n up to do.

[Adam Sinkus]

I have a z-glo mrv for sale and a prototype buzz that is labeled discraft one disc challenge disc. and a discraft xl with a no foolin 2002 stamp signed by ron russell. Make me an offer