So, I have leftover 30€ in my steam wallet. You can buy 1 game with 30€ or many games with 30€.

So basically you'll buy a game, send it to us, and then you'll get what you were offered?

Is that how it works?

Basically, I add you as friend in steam, you choose the game, send me the items/tc, I will buy the game as a gift. In steam shopping cart you can choose to buy as a gift or buy for yourself.