If there is a "Best Offer" on this item I am expecting an offer above the starting price.  Most of my listings are timed to expire when I will be around to deal with the sale.  Ending earlier makes it more difficult for me and won't necessarily mean I send it any earlier or you can pick it up earlier.

Most items that have a postage option are already packed and ready to send.  I use suitable packaging and if the items needs it, I will use new double-wall cardboard boxes.  Packaging costs money so postage costs sometimes include something towards the packaging.

If there is a postage option and you buy more than one item it is unlikely I will be able to combine postage.  

In some cases an item may come in more than one box.  This is often due to the spare of one part being long and thin and not easy to put in a box with other parts.  

I hope you will be satisfied with the item you receive.  I have tried hard to note anything that might been needed to help you decide whether to buy or not.  If there is something wrong I will normally ask you to return the item.  I have dealt with enough buyers to know that if there is genuinely an issue, this is the right way to proceed.