The title should be something like 'Up to 20 Random Steam Keys' because you're not auctioning 20 keys, you're auctioning up to 20, if you favor the circumstances.
i have a treasure trove of like 200 keys. south park: stick of truth. ark survival evolved. grav. fallout 4. skyrim legendary edition. ive coded a random number picker in visual studio and have the games numbered off between 1 and 203 i will pick the keys using the random number picker so there is no guarantee. you will get the games i just named off
its random if you get 20 keys the value will be around 350 regardless of which ones you get that is a guarantee. the values are based off of their value at the time i obtained the individual key.