Hey guys.

I'm currently thinking about whether or not i should get into the mining game.

Read this forum for several hours and put every information i got into an excel sheet.

outcome: with difficulty increasing 37% every 2 weeks (source: http://forum.bitcoin.org/?topic=5826.0), i would make 300 dollars profit (hardware-costs included) after 10 weeks.

is there something wrong with my calculations?

have several £50 amazon.co.uk gift certificates.  5% rebate.

will sell for bitcoins or mt. gox funds.

habe mehrere 50 euro amazon gutscheine im angebot.

verkaufe zum aktuellen mt.gox kurs mit 5% rabatt (zu euren gunsten)

have: pokerstars/fulltilt money
want: bitcoins or mt.gox funds

will pay 5% markup