The Full Art Supporters are gorgeous, I've read these are quite expensive?
Depends a lot on which one. As you could expect, the ones that are used the most are the most expensive ones, while the ones that are situational, useful only on specific decks, or just straight up bad, are rather cheap. Most of them are pretty affordable, actually. However, a few of them are core to pretty much every deck, and end up costing quite a bit because of that (Cynthia is 40+ packs, Guzma is 17 or so, Professor Elm is around 10, etc).
Since I'm new with not ample to offer, I'm not getting that many results in the public trades section which makes it hard to see what things are going for.
You can use OU7C4ST's Card Value Guide (you can search it in google) as a reference. The best way to know the prices of cards is to go to the Public Trades and look at what's being offering for it and asking for it, and then calculate an average. The Card Value Guide though is a good way to quickly know the approximate value of a lot of cards.
One thing I should note is that it's usually hard to trade cards for other cards unless you're offering something of high value. Offering low value cards for other low value cards can work, but offering a massive stack of cheap cards for a single, expensive one usually doesn't work (so, trading 99 random rares in exchange for a 5 pack card might not result even if the values technically add up). Using packs as a form of currency is usually the better way. Incidentally, right now the most used "currency" is Lost Thunder packs, followed by Guardian Rising packs. You can offer any pack you want, of course, but if you look at public trades there are a lot of things being offered in exchange for one of these 2 packs.
Can anyone tell me approximately how much the following are, both FA and regular?
Team Flare Grunt (1.75)
Team Rocket's Handiwork (1)
Team Skull Grunt (1)
The price of each of those (for the RA) is probably between 0.5 and 1 pack. If you set up trades offering 1 pack for 1 or 2 supporters and you're patient, you may be able to obtain most of those like that.
As for the FA, I marked (in red) in the quote above the prices, going by their value in OU7C4ST's guide. The ones in this list are actually pretty affordable.
Also, I'd like to get rid of some commons, uncommons and rares. Ones that don't have good abilities, how much should I ask for. For example, 0.5 for 5 rares? Do Holo and Reverse Holo make a difference? Thanks!
You can try to trade those in bulk, but don't expect them to catch too much interest. I've never tried to trade those off, but if I were to try, I'd probably ask for low value packs in exchange, and maybe value each common at 0.1 or so.
Reverse Holo cards can catch a slightly higher price, but if they're still random cards that no one uses we're still not looking at very big trade.
Honestly, I don't think I can give you very good advice for this point in particular. I have a hard time pricing anything that isn't already on a price list, and I don't really know how much people are willing to pay for this type of cards.
Edited by Sakura150612, 26 December 2018 - 11:58 AM.