I saw that eBay seller.  But do these pins give any greater functionally than the Dorman pins that are 4 times less money?

I've not used either so I really can't say for sure, but my guess would be probably not. The sizing might be a little different.

I wish I could remember where I bought mine, but the kit in the pic looks like what I bought.  They really worked good and definitely no more door sag.