HI,
Don't let EBAY scare you.
You can do it! They walk you through the listing. The fees are not high and it is a fun and sometimes profitable way to clean out your unwanted items. I NEVER list anything until after I have it weighed! Charge the minimum for shipping and do not charge a handling fee. I won't buy from people that charge an outragious amount for shipping. You can always take your pictures then go to the PO and have it weighed.
Good Luck!