Depends on how much effort you want to put in and how much cash you want out.
When i got rid of my collection i ended up using a shop to sell it for me and they took a cut. The downside is the cut was 30%, but on the plus side i got to control the price, didn't have to deal with eBay or multiple private shipping, didn't have to deal with 'people' who would complain or haggle etc. Also being in a shop the foot traffic meant the stuff went quite quickly, all i had to do was drop off and then pick up the cash later.
You could always sell to a dealer but they will look to make 200-300% so you will only get pennies on the pound there, only up side is the speed of the deal.
Otherwise individual listings here or eBay, probably get the most money but the highest levels of hassle and take the longest?