Is this unethical?

[Sooga]

I love going to batting cages. It's a good way to get some stress out, and get a little bit of exercise while I'm at it.

What I do not enjoy is buying the tokens for $2.50 each to buy me only 25 pitches.

So I went onto ebay and found a bag of 75 of the same-size batting tokens available for $32 including shipping. While I wasn't sure if these would work at the batting cage, I figured it was worth the gamble. So I bought them.

And not only did they work, but by sheer luck, the branding on the coins I got is identical to the branding of a 'real' token.

My co-workers seemed to be split on the issue. About half of them thought this was flat-out stealing, another half thought that if extra tokens were so easy to obtain, then I'd be a fool to not get them and try to use them. What say you?