I want to buy a laptop or PC but I want to gamble with it and it must be cheap
PC is always better, preferably a self-built one.
If you mean cheap under 600-700 euro, you stay in. Only one PC to choose from.
Take 600 euro in the hand, then get a relatively reasonable PC with the most you can gamble.
PC is cheaper
How much do you want to spend and must be mouse, keyboard and monitor with it?
Tower PCs are cheaper (price / performance ratio is much better).
Please do not let any overpriced ready PC turn.