The PTCGO values listed here are my observations,as i see them(fair prices) so they may not be
what most people think.
There are 2 ways to get the cards you want on PTCGO
1.by using "public offers"
2.by trading via forums and with people who gather large amounts of cards by smart trading/ripping off other people in public offers(Example:Catcher for 1 pack)
The trading currency for PTCGO is packs.Some players may trade card(s) for card(s),but the vast majority prefer packs.
The priority of packs(desirability) as i see it is like this
1.most wanted=Boundaries crossed packs;that is because of the chances of Full art Ex cards,Trainers and most of all the rare chance of obtaining Keldeo ex which is the most sought after card in PTCGO at the moment.
2.Dark explorers=dark patches,ultra ball,but most wanted from here is Darkrai ex,Tornadus ex and the second most wanted card of PTCGO -pokemon catcher
3.Dragons exalted=Garchomp,Altaria,Hydreignon(ability),Ho oh ex,Terrakion ex
The most wanted cards list
The top of the list at the moment is FA or normal art of Keldeo ex which varies in price from 12-14 for normal art up to 16 for FA.
Catcher is the card that most of the players will not want to trade.There are various public offers for them but i consider all of them ripping people off.The reason for that is people don't open EP packs anymore,so there is a limited/small amount of normal catchers up for trade.Of course there is a possibility of a secret rare catcher,but those are way overpriced.The price of Pokemon Catcher according to people who do trade them is 3-4 packs,but if you manage to get a playset,i wouldn't trade it.
Darkrai ex,Rayquaza ex and Mewtwo ex used to be on the top of trading list,but with the release of their promotional versions they aren't there anymore except for players who want to reverse their decks,fill it with rare cards and use a lot of packs to obtain them.The easiest way to get them is to offer 2-3 packs per card in public trade.Their FA versions price goes from 6-8 packs.
Other cards you might want to get
-Garchomp (3-5 packs ea)
-Blastoise(3-4 packs ea)
-Hydreignon dark trance)4-6 packs ea)
-Terrakion ex(6-8 packs ea)
-Tornadus ex(4-7 packs ea)
Terrakion revenge(4-7 packs ea)
Child accounts are prohibited from trading.
Non friend players can only trade like for like cards,so friending players is the obvious option.
To trade cards for something else you have to declick the like for like option.When you add
friends it might take a while to get them on your friend list so you should just open the public offers for a second then reopen the private trade window and the person you are looking for should be in your friends list.
When trading with another person you might get a "xy doesn't have any tradable items marked for trade" message.in such cases you should click ok.then click add button again and when you have the
"no cards returned with current filters " message declick the "show only items i want" button.that will show all the cards the other player has for trade.
The new system doesn't allow for adding multiple cards at once so you have to add x amount of cards by clicking add and selecting a card x number of times.
If anyone needs any help in trading feel free to post here.I'm no expert in trading but i will try to help.