1. If there is possibilities of increasing coins in inventory and merchants up to 50gbs would be awesome, with the restriction features where you have more than 21gb in inventory you cannot leave moradon zone, this would prevent of losing big sums of coins in cz or other zone e.g war invade
This will save alot of times for people that has less time finding items with shout and pms, you can just grab pretty much any average items when its on merchant
2. People usually tend to mistakenly pricing the merchants item, sometimes you dont even notice. if u can implement alphabet in merchant price and make it round amount
e.g if you type 1gb it will automatically round the amount to 100,000,000, if you type 1m it will round to 1,000,000, since word gb and m is widely use to address the price of items.