Not looked into it seriously yet but im sure there will be ways around paying tax. Speaking to an accountant would be a good start. From what i understand (which may not be entirely or even remotely correct) you dont pay tax on private car sales so if you buy a car using bitcoin from these guys
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Then sell it on and bank the pennies.
Gambling winnings are also not taxed so you could try your luck that way tho it certainly wouldnt be my first choice.