Next time you purchase something for cash, keep your paypal receit, and at the end of the year, be sure to claim it as a gaming expense. Do NOT attempt to take a deduction for the expense, but simply write a small letter with your return asking if a deduction is applicable in your situation.
I'd give 9-5 odds that if we did that, 80% of all cash sales would end within a year, and will have ended so in an honest and by the rules fashion. reg
reg