PC on my Minipet Collection

OK, I'm thinking of selling off my entire collection of minipets. They are all undedicated, and I'd like to know what they're worth as a whole, ie if I was to sell them all off at the same time as one item in one sale. Therefore I have two questions: one being, what's the value of the collection (obviously), and two, how would I go about the trade to make sure it goes smoothly? Since you can't have more than seven items in the trade window what's the best way to conduct large transactions?
Thanks in advance .

Here's a pic with a list of what's in it below, there are 34 minis in total:




From left to right:

Fungal Wallow, Heket Warrior, Hydra, Jade Armour, Juggernaut, Jungle Troll, Necrid Horseman, Seige Turtle, Temple Guardian, Thorn Wolf, Whiptail Devourer, Irukandji, Forest Minotaur, Wind Rider, Aatxe, Fire Imp, Mandragor Imp, Harpy Ranger, Palawa Joko, Koss, Burning Titan, Charr Shaman, Kirin, Asura, Gray Giant, Pig, Prince Rurik, Shiro, Celestial Rat, Destroyer of Flesh, Ceratadon, Varesh, Black Moa Chick, Bone Dragon.

Honestly, you're taking a risk trying to sell them off in a group unless you do so and then split each trade down into what the actual minis you're trading are worth. And you're probably going to take a bit of a hit selling them as a group since most people only want certain ones and will not be willing to pay full price for the rest, so they can resell them. In general tho, I would guess your collection is worth maybe 450k or so.

I bought a group a little bigger than that one for 200k. But I sold em individually and it came out to about 350-400k. You can deide on that.