Do you still pay listing and final value fee if you opt for this classified marketing method?
No final value fee, only a listing fee. Now there are plenty of downsides. Classified listings aren't available for many categories, so you may well have to find a creative way around that. It is more expensive upfront, but you do get 28 days (Australia does at least) and it's a one time charge per each listing cycle.
The benefits, well they're quite clear. Being able to direct traffic straight to your own website gives you complete retail flexibility.