usually end up only listing my own things when I need some $$ to buy something new. I keep thinking I am good parting with anything here and then I get it out and look at it and I don't want to part with it.
eBay selling is not for the faint hearted. As everyone probably knows by now I sell for other people mainly in the area. I actually like selling on eBay but the 15% fee does irk me. Plus you need to be prepared to pack and ship which the supplies expense add up. I like that the items reach a wide audience and thankfully (knock on wood) my experiences have been been good with buyers.
Getting to your selling, I find people don't like buying in lots unless they have a specific need for a quantity of anything. I suggest listing dolls individually and offering discount on bulk purchases.
I also suggest additional shipping based on location.
Because your time is limited I think it would be best to list slowly. Start off with 20 items and add 15-20 each week. That way if you get a lot of orders you are not too overwhelmed with having to get them mailed.
I also suggest create a number system for the items. When I started selling I would go crazy trying to find an item among everything I had listed and in bins to ship. Now everything is numbered and I keep them in bins with the item numbers on a piece of paper on the outside. For example, take a photo of 10 dolls and assign each a number 1-10. The next ten assign 11-20. They all go in one bin and outside mark 1-20. Then you only have to sort through those 20 to find what you are looking for. Then the next bin would be say dolls 21-40.
Good luck! Its a lot of work. As we all get older, its good to plan what we need to do with our collections.