The big postage question

I would like to get opinions from buyers on what they like to see when purchasing an item and from sellers, to see what they have found works for them. 

 

 

As a part time seller on eBay, I always ask myself, should I do postage this way or that way. I have watched many videos and gone to many sites but I am still not satisficed. 

I started selling items all with free postage but found, I always lost money especially if I accepted an offer.

I then went on to doing half postage which seemed to work pretty good for the most part. 

Now, I just started doing full postage but am un decided if I should price my items as normal or reduce the price as a buyer might not want to pay for a full priced item and postage.

 

Lets say an item you are selling is for $20.
Do you like to see "Free postage" meaning the seller would sell the item for $30 with the postage built in?
Do you prefer seeing the postage separated from the item you are buying?
Say, half price postage, so $4.85 postage and $4.85 built into the price making the listing $25 with $4.85 postage
Maybe full postage selling the item at $20 with $9.70 postage?
Or would selling a $20 item for $30 be to much? So listing the item at $10 with $9.70 postage maybe?