It is not hard to find a good food steamer online that runs on electricity without paying a lot of money. In fact, one model is selling right now at Amazon for $16.
Alternatively, you can find electric food steamers at such places as Target and WalMart, but the selection at Amazon is quite broad, unlike other places -- you will likely save the most money shopping at Amazon for a steamer.
Some offline options for you involve going to garage sales and estate sales. You may have to search high-and-low for a good quality electric steamer at these types of sales.
If you hit a Goodwill Store on the right day, you can find a steamer, but this is not a typical, everyday item for them.
Finally, if you can find an electric steamer available at auction (where you will find better savings than Buy It Now pricing) on eBay, you have the opportunity to get a new one at a good deal.
Whichever path you take to your new cooker, I hope you have a steaming good time!