Mow some lawns, sell some lemonade or pimp yourself out to make up the difference. If you're worried about $50 bucks on a $500+ card, your priorities are messed up.
Some reading material during your wait: http://en.wikipedia.org/wiki/Opportunity_cost
Some reading material during your spending spree http://en.wikipedia.org/wiki/Dennis_Rodman
A fool and his money are soon parted. Price/performance always matters.