has anyone bought a gun off there?If so how does it work

Contact the seller. They will help you.

but dont you have to have a license

I think most auction sites have a FAQ on how to buy. My best suggestion is to go back to their site, you should be able to find an easy to following procedure.

The basics of buying guns from any website.
Pay for your gun in advance, including shipping and send a FFL from your local gun shop.
The gunwill need to be shipped to your local gun shop.
You go there and process all the Federal, State and local paperwork and pay any additional fees fro processing and handling that the shop owner may charge. I know some shops where the fee is $10 and some that want $50 for processing the same paperwork.

i just bought the Remington double rifle off them last week,first time i ever bought a firearm online.i emailed the seller and said i was interested.he answered me back and gave me details.i then called him,paid for it and he sent it to dealer near me ,in 3 days that dealer called me,i went and picked it up. easy as pie.

To buy a gun off one of these auction sites, you must have the gun sent to your local friendly FFL holder, who does the paperwork and background check phonecall for a small fee. Most sites havedealer listings for your locale, so you can contact the local guy.

I have purchased a couple of rifles this way, no sweat!

Remember too when you talk to an ffl about shipping it in to him offer to buy your scope mounts and or scope if he wont charge you for the transfer. It works with 98% if them. You get something you would probably be buying anyways and hes happy because he still made a sale.

I am buying a Sako 75 Finnlite in 243 off Gunsamerica today.