Saw this the other day on SlickGuns.com, and downloaded it to my Android phone once I got home...
SlickGuns.com Bar Code Scanner Application
Took it to the gun show yesterday and it was a lot of fun, it's nice to know what a firearm or ammo are selling for on that website before shelling out considerably more for the same item at the show. And, for vendors that will negotiate, it's helpful in find a price that both the buyer and seller find acceptable.
Now, just to note I understand businesses have to make money and I don't have any problems with that. Actually, I prefer to spend my money at a local gun shop than I do online companies as it is mutually beneficial to do so. However, there is still a lot of price gouging going on especially at gun shows here and I prefer to be armed with as much information that I can get. When .22 ammo is still being sold at 2-3x the price I can get it at elsewhere, I have no problem with going with the cheaper source. However, shops that are not too much more expensive than the online price will get my business every time as well as my recommendation to others as it is mutually beneficial for all involved.
Cheers! M2