Online electronics store eCost is offering several today-only (Monday, December 7, 2009) sales on game systems and electronics.

The trick with these sales is that you need to purchase the site’s Platinum Premium membership, which costs $39.95, and the deals are randomly offered throughout a small time chunk. If you plan to buy a lot from the site the Platinum Premium club can be worth it since it saves you the $10+ shipping cost on each order.

Today’s deals include…

Remember eCost’s Black Friday (2008) deal for a Wii for only $99? It became so popular that the company turned it from a system per hour into a catch-the-bargain-if-you-can style sale to further inflate the site’s traffic.

This time eCost has offered two Wiis for $69 each (includes Wii Sports, WiiMote and Nunchuck), two first gen 4GB iPhones for $99 each, two Intel Netbooks for $99 and two Blue-Ray players for $74, along with a few other deals.

But, before you get too excited, there are catches