I don't know the values of the guns, but I just started selling some this past Feb and it was my first experience selling guns over the net. I've sold quite a few for a friends father and my father inlaw and it isn't really that bad. I haven't had any probs yet.
I usually ask for USPS MOs. It seems that they are hardest to duplicate.
If someone wants to pay with something other than that, I wait till the check clears before I ship.
I usually include shipping in the price. Helps with selling.
If the gun is worth more than a grand I usually include insurance also.
Check
www.gunbroker.com or some of the other auction sites and it will give you an idea of what they are going for.
A 3 day inspection period doesn't hurt if the guns are worth alot.
It's easiest to ship USPS and a little cheaper.
Get a tracking # and give it to the buyer. Puts thier mind at ease.
You have to ship to an FFL if shipping out of state and I usually ask for a copy of it with the check.
Once you get going you'll get addicted and it really isn't that hard. From my experiences most gun guys are good people. Good luck