You can use gunbroker.com for pics, and a general idea of what you'll pay

For new guns, it's hard to beat prices at walmart.com

You should seriously look at a 7mm-08 also. It's just as lethal as the others inside of 300 yds on deer, will have the least recoil, shoots really flat, and is generally matched with fairly short barrels (as is the 308).

good luck