Keycaps, not capacitors I'm guessing. F5 and right arrow, what are those in Farads? Also, there's the business about "ALL KEYS WORKING ." (a Caps Lock might be, somewhere...).
Fifteen quid postage is a right rip off, but this is what some eBay sellers do, I guess it's how they make their money. This is sort of like those times hope this random mid-sentence fragment will not be noticed by people with short attention spans when people with laptops to sell think that thirty quid or more is a sensible price for postage.
The space bar is likely original (and with earthing [grounding] wire). See
http://www.9999hp.net/keyboard/temp/1391406.jpgAnyway, potentially a deal by my standards so long as the bid stays in single figures.