After managing to find the solution to the issue of saving eBay searches with real names (see this thread) I decided to do a bit more research on another annoying change eBay made a while back.
In the good old days, when an item sold to a best offer you could see the final price when searching through sold items. Then eBay decided to hide the final sale price, which was especially frustrating for me because I try to track and record auction results for my sites.
Anyway, with a bit of research I was able to find a workaround that I believe uses the same kind of mechanism as the save searches trick - triggering older code that shows the features that are now 'obsolete'.
For want of a better place I put this on the Links page of my Space Flown Artifacts site. You need to enter an eBay item id and it will open an eBay closed item search results page which should show the closing price.
Hope this helps some people out.