Depositing only 1 dollar or euro, Pound, is a good start to try with low playing slots, 20 cents, and you can play, some of these casinos give you 20 dollar if you deposit only 1 dollar, Euro or Pound, so there is nothing to say about that.
Minimum deposit only $1.00, £1.00, €1.00, Euro Palace Casino
As a new, Real Money player at Euro Palace online casino you have access to the $/£/€500 in New Player Welcome Bonuses.
Casinos also give you free money, if you play it, you can always try to deposit 1 to see if it works for you and if you like the casino, it's a good way to start. Not expensive.
$/€/£1 minimum deposit using a VISA card, neteller, Skrill, Paypal etc..
Bet 365 (Playtech) has 1$ min deposit through SKRILL.
Some casinos accept a deposit of just 1 using UKash
The payment options in these casinos are tested and trusted