Don't take them to a brick and mortar gun shop! They are brutal when buying and you will be lucky to get half of what they are worth. Best bet is to sell them on Gunbroker. You will have to ship to an FFL in the buyer's state most likely but you will get the best price. Look at Gunbroker sales for a similar gun to see what a realistic asking price should be.
If you don't want to do Gunbroker, take them to a large gun show in your area and carry them around with a for sale sign. Also show them to several dealers at the show and get some competing offers. Depending on your state's laws, you may or may not need to go through an FFL at the show to complete the sale. Rules sometimes vary depending on whether its a rifle or hand gun, but some states allow private sales of either. Do a search for your state laws or look on-line for a gun forum in your state for advice.
I'm guessing the Luger alone would bring 1000 or more depending on dates, model, etc. Each of the others should be worth at least 400 or more. Do some research.