IknowWhatILike
Winger
Not many tips for this year now, I’m not in that group anymore unfortunately.
You'll never go wrong buying discard price in forms for 12k or so, and listing for 18k. If you can be arsed to relist the trade pile 5 or 6 times a day on the web/mobile app you'll always do well enough.
Good league and nationality will provide more sales. And when a squad builder is released that needs them, they'll rocket in price. Also buying the cheapest 84/85/86 rated in forms and doing the same thing.
I do it every year - although working from home I've often been able to relist my trade pile 10 times a day - and alongside coins from weekly rewards, I dont think ive ever ended up on less than 5 or 6 million coins