Try Craig's list if its in your area.
go for the m14, unless its cheap looking.
69
walmart
Most of the guns listed here will shoot around 400 fps or above. http://www.6mmbb.com/servlet/the-Airsoft-Sniper-Rifles/Categories Expensive guns are around $300-$800.
maybe
A good FPS (Feet Per Second) for an airsoft gun depends on where you will be playing. Typically, FPS between 300-400 is suitable for indoor play, while 400-500 FPS is better for outdoor fields. Check with your local field regulations for specific guidelines.
most likely about 10-20 fps
.20 for a 300-360 FPS and .25 for anything above 360 FPS.
most cheap spring guns at walmart have very low velocity
The answer depends on if you are using .2 gramm or other ammunition, but yes that is the average fps for a moderate airsoft gun.
Not much. It is only 130 feet per second. It sounds fast, but in reality, most airsoft guns shoot at about 300 fps.
That depends on the manufacturer. Most will go about 300 - 350 fps (from WE, KWA, ect.) while Tokyo Marui ones go about 260-280 fps