Here's your best option at the moment for making as much BTC with $250.
Hire a trusted escrow agent from this forum, send him $250 first, have him contact me, I'll send him 0.8 BTC, he gives me $250, he sends you 0.8 BTC that he received from me, and now you would be positive 0.8 BTC in the black, which is more than you'd ever get mining in infinity years.
Honest truth.
Funny
but 100% the truth