I second Chicken's comment. Start with something inexpensive. You may find that the routines simply "are not you" so why waste money on the Rolls Royce of coin gimmick sets only to have the coins sit in a drawer. However (If you fall in love with the routines) you will find that while it may only take a few days to memorize the "series of moves" it will take quite a while to make them look *magical*.
During the training process start saving your money. If you are able to put back $20 a week you will have enough money in approximately 4 months. If you find that you are *still* in love with the routines in 4 months, go ahead and buy the expensive gimmicks. If you find that you are no longer practicing the routines you are better off spending your savings on something else.
Also, dropping a gimmicked coin can damage it, so better to practice (on carpet) with something inexpensive at first. Ike's also "talk", so the first production of CoinTwo will have to be slightly modified to be noiseless. CoinOne has no such problem.
Working with Ike's will also let you discover if dollar sized coins are a good fit for your hands. Don't be afraid of performing CoinOne or CoinTwo with half dollar sized coins if you have smaller hands or a limited budget.
-ThisOneGoesTo11