Everyone wants a sweet ride!
Sadly some of the best mounts require ether A: a lot of money to spend on E-bay or B: a lot of gold grinding in game.
I'm almost complete with my Insane grind and with nothing but my guild to sink money into I figured hey time to start savin' for some more mounts!

So I wanna know, what's a fair price for these TCG mounts?
I'm personally looking at both the spectral tigers and both the X-51 Nether rockets but I wouldn't mind knowing the average prices of the others.

If you aren't sure which mounts you can actually buy here they are:
Reins of the Swift Spectral Tiger
Reins of the Spectral Tiger
Big Battle Bear
Blazing Hippogryph
Magical Rooster Egg
Mottled Drake
Wooly White Rhino
X-51 Nether-Rocket X-TREME
X-51 Nether-Rocket

If you know a normal price for any of these I would be greatly appreciated! I transferred back home to my dead server Korialstrasz so I'm sure I'll pay a little extra but a nice ballpark idea of how much I need to save would be great!

There's a mottled drake on the SS AH for 100k atm though I have seen it for less, 60k ish for the rhino and 80 for the drake
and 150k for the blazing hippogryph

have yet to see anything else for sale however

The prices in the first reply are fairly accurate unless you run into a mount seller like me at Aman'Thul because I am looking to make a profit on each mount. I have sold a rhino for 150k, two blazing hippos for 150k a piece and one Spectral Tiger for 250k plus truegold bars. Currently, I have two Swift Spectral Tigers for sale.

On average, a Swift Spectral Tiger will sell for around 300,000 gold on most realms. If you find a mount seller, try to bargain with him using a large portion of gold and some mats. For example, players want to buy my Swift Spectral Tiger mounts. If they can come up 235,000 in gold plus Vials of Sands, choppers, or truegold bars for each tiger, we will work out a happy arrangement. Psst the mount seller and try to work out a bargain with him, so you get your "sweet ride," and he gets a healthier bank account.

I've seen a swift spectral tiger on my realm for 200k even but this realm is extremely dead so I would imagine selling anything here would kinda suck. I've seen the regular spectral for less but I know it varies from realm to realm.

What is the gold cap for characters anyway? I've looked it up a few times but the posts I found are ancient so I'm not sure how accurate they are now.

The gold cap now is 999,999g 99s 99c

I bought my own spectral for 125K the night I completed Shadowmourne. However, I've noted since then a couple for sale for around 200K each time.